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🛠️ How to Clear Cache in WordPress for the Search Atlas Plugin

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Camilo Aponte

Camilo Aponte

Last updated on Sep 30, 2026

If the OTTO Pixel isn't showing as detected after installing the Search Atlas plugin, caching is the most common cause. On most sites, clearing the WordPress cache is enough — but if you're on a CDN-backed host (such as Cloudflare or Pressable), you'll also need to purge your CDN cache to ensure OTTO detects the pixel correctly.

⚙️ Confirm Your Search Atlas Plugin Settings First

Before clearing any cache, verify the plugin is configured correctly:

  1. Go to the Search Atlas plugin settings in your WordPress dashboard.
  2. Confirm your API keys and UUID are correctly filled in.
  3. Click Save to apply the settings.

Your configuration is saved and ready for the cache-clearing steps below.

🗑️ Clear Your WordPress Cache

  1. Go to the frontend of your WordPress site.
  2. In the top admin bar (top-right corner), click Clear Caches.
  3. From the dropdown menu, select Clear All Caches.

This clears outdated content from WordPress's caching layer and helps OTTO register the plugin correctly.

☁️ Clear Your CDN Cache (Non-WP-Rocket Sites)

If your site runs on a CDN-backed host — such as Cloudflare, Pressable, or a similar edge-caching service — you also need to purge your CDN cache separately.

Why this matters: A bug (WP-329) caused the OTTO plugin to send Cache-Control: public, max-age=3600 headers on non-WP-Rocket sites. This instructed CDNs and edge servers to aggressively cache pages, so a WordPress-level cache clear was immediately overridden — your CDN would re-serve stale content right away. Affected sites could also see broken forms and exposed nonces as side effects. This issue is fully resolved in the WP-329 plugin update.

If you installed the Search Atlas plugin before this fix was released, perform a one-time CDN purge:

  • Cloudflare: In your Cloudflare dashboard, go to Caching → Configuration, then click Purge Everything.
  • Pressable: In your Pressable dashboard, go to Sites → [Your Site], then click Clear Cache.
  • Other CDN or host: Refer to your host's documentation for a full edge-cache purge.

After purging, your CDN will serve fresh content and OTTO can detect the pixel on the next scan.

🔍 Verify OTTO Pixel Detection

  1. Return to your OTTO dashboard.
  2. Click Scan.

OTTO should now detect the pixel and display a confirmation message.

🛠️ Troubleshoot If the OTTO Pixel Still Isn't Detected

If OTTO still can't detect the pixel after completing all steps above, try the following:

  • Repeat both the WordPress cache clear and the CDN cache purge.
  • Confirm the Search Atlas plugin is updated to the latest version, which includes the WP-329 fix.
  • Check that no other plugin or server rule is overriding Cache-Control headers on your site.
  • Contact Search Atlas Support — we can verify your configuration and walk you through any remaining steps.

🎯 You now know how to clear both WordPress and CDN caches to get the OTTO Pixel detected correctly — including the extra CDN purge step needed on non-WP-Rocket hosts. If you're setting up the Search Atlas plugin for the first time, see our Search Atlas WordPress Plugin Installation Guide for full setup instructions.