2.2K+ bought in the past month. 5.5K+ reviews. 4.2/5 stars. Your pimple patch isn’t working because the zit isn’t on the surface yet. A zit can form for days under the skin before you ever see it. KILLA uses 24 self-dissolving microdarts to deliver salicylic acid and Oligopeptide-76 right where it’s brewing. Patch it on. Sleep on it. Get on with your day.