diff --git a/public/observers.js b/public/observers.js
index ceeb270e1..54c9a90f1 100644
--- a/public/observers.js
+++ b/public/observers.js
@@ -538,7 +538,7 @@ window.preserveCompareSelection = function preserveCompareSelection(prevIds, tbo
     var content = window.SlideOver.open({ title: (o.name || o.id) });
     var naiveChipHTML = window.ObserversNaiveChip.render(o);
     content.innerHTML =
-      (naiveChipHTML ? '<div style="margin-bottom:10px">' + naiveChipHTML + ' <span class="text-muted">Clock is naive — per-packet timing clamped to ingest time.</span></div>' : '') +
+      (naiveChipHTML ? '<div style="margin-bottom:10px">' + naiveChipHTML + ' <span class="text-muted">Clock is naive — per-packet timing clamped to ingest time. Clears itself 24h after the last skew event.</span></div>' : '') +
       '<dl class="slide-over-dl" style="margin:0;display:grid;grid-template-columns:auto 1fr;gap:6px 12px;font-size:13px">' +
         '<dt>Status</dt><dd><span class="health-dot ' + h.cls + '"><svg class="ph-icon" aria-hidden="true" focusable="false"><use href="/icons/phosphor-sprite.svg#ph-circle-fill"></use></svg></span> ' + h.label + '</dd>' +
         '<dt>Region</dt><dd>' + (o.iata ? '<span class="badge-region">' + o.iata + '</span>' : '—') + '</dd>' +