diff --git a/src/librssguard/database/databasequeries.cpp b/src/librssguard/database/databasequeries.cpp
index 4a824f30f..839bdd35c 100644
--- a/src/librssguard/database/databasequeries.cpp
+++ b/src/librssguard/database/databasequeries.cpp
@@ -1857,6 +1857,38 @@ bool DatabaseQueries::cleanLabelledMessages(const QSqlDatabase& db, bool clean_r
   }
 }
 
+void DatabaseQueries::cleanProbedMessages(const QSqlDatabase& db, bool clean_read_only, Search* probe) {
+  QSqlQuery q(db);
+
+  q.setForwardOnly(true);
+
+  if (clean_read_only) {
+    q.prepare(QSL("UPDATE Messages SET is_deleted = :deleted "
+                  "WHERE "
+                  "  is_deleted = 0 AND "
+                  "  is_pdeleted = 0 AND "
+                  "  is_read = 1 AND "
+                  "  account_id = :account_id AND "
+                  "  (title REGEXP :fltr OR contents REGEXP :fltr);"));
+  }
+  else {
+    q.prepare(QSL("UPDATE Messages SET is_deleted = :deleted "
+                  "WHERE "
+                  "  is_deleted = 0 AND "
+                  "  is_pdeleted = 0 AND "
+                  "  account_id = :account_id AND "
+                  "  (title REGEXP :fltr OR contents REGEXP :fltr);"));
+  }
+
+  q.bindValue(QSL(":deleted"), 1);
+  q.bindValue(QSL(":account_id"), probe->getParentServiceRoot()->accountId());
+  q.bindValue(QSL(":fltr"), probe->filter());
+
+  if (!q.exec()) {
+    throw ApplicationException(q.lastError().text());
+  }
+}
+
 bool DatabaseQueries::cleanImportantMessages(const QSqlDatabase& db, bool clean_read_only, int account_id) {
   QSqlQuery q(db);
 
diff --git a/src/librssguard/database/databasequeries.h b/src/librssguard/database/databasequeries.h
index 72725bc9b..3a6559c9b 100644
--- a/src/librssguard/database/databasequeries.h
+++ b/src/librssguard/database/databasequeries.h
@@ -173,6 +173,7 @@ class DatabaseQueries {
                                   bool delete_messages_too,
                                   bool delete_labels_too);
     static bool cleanLabelledMessages(const QSqlDatabase& db, bool clean_read_only, Label* label);
+    static void cleanProbedMessages(const QSqlDatabase& db, bool clean_read_only, Search* probe);
     static bool cleanImportantMessages(const QSqlDatabase& db, bool clean_read_only, int account_id);
     static bool cleanUnreadMessages(const QSqlDatabase& db, int account_id);
     static bool cleanFeeds(const QSqlDatabase& db, const QStringList& ids, bool clean_read_only, int account_id);
diff --git a/src/librssguard/gui/reusable/helpspoiler.cpp b/src/librssguard/gui/reusable/helpspoiler.cpp
index 1f40f1f74..d93184a8f 100644
--- a/src/librssguard/gui/reusable/helpspoiler.cpp
+++ b/src/librssguard/gui/reusable/helpspoiler.cpp
@@ -7,19 +7,19 @@
 #include "gui/reusable/plaintoolbutton.h"
 #include "miscellaneous/application.h"
 #include "miscellaneous/iconfactory.h"
+#include "network-web/webfactory.h"
 
 #include <QGridLayout>
 #include <QParallelAnimationGroup>
 #include <QPropertyAnimation>
 #include <QScrollArea>
-#include <QTextEdit>
+#include <QTextBrowser>
 #include <QToolButton>
 
 HelpSpoiler::HelpSpoiler(QWidget* parent)
   : QWidget(parent), m_btnToggle(new QToolButton(this)), m_content(new QScrollArea(this)),
-    m_animation(new QParallelAnimationGroup(this)), m_layout(new QGridLayout(this)), m_text(new QTextEdit(this)),
+    m_animation(new QParallelAnimationGroup(this)), m_layout(new QGridLayout(this)), m_text(new QTextBrowser(this)),
     m_btnHelp(new PlainToolButton(this)) {
-
   m_btnToggle->setStyleSheet(QSL("QToolButton { border: none; }"));
   m_btnToggle->setToolButtonStyle(Qt::ToolButtonStyle::ToolButtonTextBesideIcon);
   m_btnToggle->setArrowType(Qt::ArrowType::RightArrow);
@@ -47,7 +47,9 @@ HelpSpoiler::HelpSpoiler(QWidget* parent)
   m_layout->addWidget(m_btnToggle, 0, 1, 1, 1, Qt::AlignmentFlag::AlignLeft);
   m_layout->addWidget(m_content, 1, 0, 1, 2);
 
-  QObject::connect(m_btnToggle, &QToolButton::clicked, [this](const bool checked) {
+  connect(m_text, &QTextBrowser::anchorClicked, this, &HelpSpoiler::onAnchorClicked);
+
+  connect(m_btnToggle, &QToolButton::clicked, [this](const bool checked) {
     const auto collapsed_height = m_btnHelp->height();
     auto content_height = m_text->document()->size().height() + 22;
 
@@ -74,7 +76,8 @@ HelpSpoiler::HelpSpoiler(QWidget* parent)
 
   m_text->viewport()->setAutoFillBackground(false);
   m_text->setFrameShape(QFrame::Shape::NoFrame);
-  m_text->setTextInteractionFlags(Qt::TextInteractionFlag::TextBrowserInteraction);
+  m_text->setOpenLinks(false);
+  m_text->setOpenExternalLinks(false);
   m_text->setVerticalScrollBarPolicy(Qt::ScrollBarPolicy::ScrollBarAlwaysOff);
   m_text->setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy::ScrollBarAlwaysOff);
   m_text->setWordWrapMode(QTextOption::WrapMode::WordWrap);
@@ -102,3 +105,7 @@ void HelpSpoiler::setHelpText(const QString& text, bool is_warning, bool force_h
 
   m_text->document()->setDocumentMargin(0);
 }
+
+void HelpSpoiler::onAnchorClicked(const QUrl& url) {
+  qApp->web()->openUrlInExternalBrowser(url.toString());
+}
diff --git a/src/librssguard/gui/reusable/helpspoiler.h b/src/librssguard/gui/reusable/helpspoiler.h
index a11e62160..d8085704c 100644
--- a/src/librssguard/gui/reusable/helpspoiler.h
+++ b/src/librssguard/gui/reusable/helpspoiler.h
@@ -5,7 +5,7 @@
 
 #include <QWidget>
 
-class QTextEdit;
+class QTextBrowser;
 class QGridLayout;
 class QToolButton;
 class QParallelAnimationGroup;
@@ -21,12 +21,15 @@ class HelpSpoiler : public QWidget {
     void setHelpText(const QString& title, const QString& text, bool is_warning, bool force_html = false);
     void setHelpText(const QString& text, bool is_warning, bool force_html = false);
 
+  private slots:
+    void onAnchorClicked(const QUrl& url);
+
   private:
     QToolButton* m_btnToggle;
     QScrollArea* m_content;
     QParallelAnimationGroup* m_animation;
     QGridLayout* m_layout;
-    QTextEdit* m_text;
+    QTextBrowser* m_text;
     PlainToolButton* m_btnHelp;
 };
 
diff --git a/src/librssguard/services/abstract/gui/formaddeditprobe.cpp b/src/librssguard/services/abstract/gui/formaddeditprobe.cpp
index bb34644d8..afb0edaed 100755
--- a/src/librssguard/services/abstract/gui/formaddeditprobe.cpp
+++ b/src/librssguard/services/abstract/gui/formaddeditprobe.cpp
@@ -12,6 +12,14 @@ FormAddEditProbe::FormAddEditProbe(QWidget* parent) : QDialog(parent), m_editabl
   m_ui.m_txtName->lineEdit()->setPlaceholderText(tr("Name for your query"));
   m_ui.m_txtFilter->lineEdit()->setPlaceholderText(tr("Regular expression"));
 
+  m_ui.m_help->setHelpText(
+    tr("What is regular expression?"),
+    tr(
+      "A regular expression (shortened as regex or regexp) is a sequence of characters that "
+      R"(specifies a match pattern in text. See more <a href="https://learn.microsoft.com/en-us/dotnet/standard/base-types/regular-expression-language-quick-reference">info</a>.)"),
+    false,
+    true);
+
   connect(m_ui.m_txtName->lineEdit(), &QLineEdit::textChanged, this, [this](const QString& text) {
     if (text.isEmpty()) {
       m_ui.m_txtName->setStatus(LineEditWithStatus::StatusType::Error, tr("Regex query name cannot be empty."));
diff --git a/src/librssguard/services/abstract/gui/formaddeditprobe.ui b/src/librssguard/services/abstract/gui/formaddeditprobe.ui
index 5d846e296..22c2a7cf5 100755
--- a/src/librssguard/services/abstract/gui/formaddeditprobe.ui
+++ b/src/librssguard/services/abstract/gui/formaddeditprobe.ui
@@ -24,7 +24,7 @@
    <item row="1" column="1">
     <widget class="LineEditWithStatus" name="m_txtFilter" native="true"/>
    </item>
-   <item row="2" column="0" colspan="2">
+   <item row="3" column="0" colspan="2">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
@@ -37,7 +37,7 @@
      </property>
     </spacer>
    </item>
-   <item row="3" column="0" colspan="2">
+   <item row="4" column="0" colspan="2">
     <widget class="QDialogButtonBox" name="m_buttonBox">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
@@ -47,6 +47,9 @@
      </property>
     </widget>
    </item>
+   <item row="2" column="0" colspan="2">
+    <widget class="HelpSpoiler" name="m_help" native="true"/>
+   </item>
   </layout>
  </widget>
  <customwidgets>
@@ -61,6 +64,12 @@
    <header>lineeditwithstatus.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>HelpSpoiler</class>
+   <extends>QWidget</extends>
+   <header>helpspoiler.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <tabstops>
   <tabstop>m_btnColor</tabstop>
diff --git a/src/librssguard/services/abstract/search.cpp b/src/librssguard/services/abstract/search.cpp
index 9eba8d8ce..4c645ca5e 100755
--- a/src/librssguard/services/abstract/search.cpp
+++ b/src/librssguard/services/abstract/search.cpp
@@ -151,18 +151,21 @@ bool Search::cleanMessages(bool clear_only_read) {
   ServiceRoot* service = getParentServiceRoot();
   QSqlDatabase database = qApp->database()->driver()->connection(metaObject()->className());
 
-  return false;
-  /*
-  if (DatabaseQueries::cleanLabelledMessages(database, clear_only_read, this)) {
+  try {
+    DatabaseQueries::cleanProbedMessages(database, clear_only_read, this);
     service->updateCounts(true);
     service->itemChanged(service->getSubTree());
     service->requestReloadMessageList(true);
     return true;
   }
-  else {
+  catch (const ApplicationException& ex) {
+    qCriticalNN << LOGSEC_CORE << "Failed to clean messages of probe:" << QUOTE_W_SPACE_DOT(ex.message());
     return false;
   }
-  */
+}
+
+QString Search::additionalTooltip() const {
+  return tr("Regular expression: %1").arg(QSL("<code>%1</code>").arg(filter()));
 }
 
 bool Search::markAsReadUnread(RootItem::ReadStatus status) {
diff --git a/src/librssguard/services/abstract/search.h b/src/librssguard/services/abstract/search.h
index d04288603..db9120734 100755
--- a/src/librssguard/services/abstract/search.h
+++ b/src/librssguard/services/abstract/search.h
@@ -27,6 +27,7 @@ class RSSGUARD_DLLSPEC Search : public RootItem {
     void setCountOfUnreadMessages(int unreadCount);
 
     virtual bool cleanMessages(bool clear_only_read);
+    virtual QString additionalTooltip() const;
     virtual bool markAsReadUnread(ReadStatus status);
     virtual int countOfAllMessages() const;
     virtual int countOfUnreadMessages() const;