Not at all. I'll usually use 70% on a rag to wipe the edge of my install area to free up any leftover grease/contaminate after my initial prep and just just before install. Alcohol is harsher than some realize. It can etch the surface slightly and sometimes burn paint altogether if the pannels are warm. The etching, however slight, provides a profile (tooth) for bonding. Kinda like sanding before paint but with chemicals. Bedliner spraying, depending on the brand, will sometimes call for MEK as a last step for the same purpose.
I'll also spray straight water around the edges after squeegee to flush out the soap, increasing tack, before trimming. Works the same with pre cut patterns.
Steam or light heat and enjoy. If the edge won't lay or pops up after steam I'll trim it back to the tack line to take it off the roll of the edge. FWIW I don't use any alcohol in my slip. I carry two bottles. One with soap and one with water only.
My guess would be...
1. Over stretch at the edges
2. Not prepping with straight alcohol
3. Wax or ceramic coating on the surface
My prep work usually starts with a clay ball on the surface and pure alcohol before an install, followed by a pure water flush on the edges before trimming the excess film. A light bit of heat 20min later.
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