Rotating content noise (visual + text diff)
Lemwatch scrubs rotating banners, timestamps, and random ads so they do not fire visual alerts.
Quick answer#
Enable Scrub rotating noise on any visual monitor. Lemwatch samples the page 3 times back-to-back, treats anything that changed between samples as noise, and diffs only what stayed stable.
What it does#
Where to find it in Lemwatch#
Visual Monitoring → [page] → Advanced → Scrub rotating noise.
How to enable it#
FAQ#
Does this slow down checks?#
Yes, ~2–3× longer per run. Only enable on pages with rotating content.
Does it replace ignore zones?#
Complement, not replacement. Use ignore zones for known-noisy regions; scrubbing catches new noise.
Related#
Related Articles
Reducing false visual alerts
Cut noisy visual alerts from ads, timestamps, and personalised content without missing real changes.
Ignore zones for visual monitoring
Mask ads, cookie banners, or rotating widgets so visual monitoring only alerts on real changes.
Visual diff thresholds explained
Tune how sensitive visual monitoring is — from tiny pixel shifts to major layout changes.
What is Lemwatch Pulse?
Pulse is a free public health scanner — anyone can drop in a URL and get a graded uptime, performance, security, and SEO snapshot in seconds.