I’m trying to cut down my prep time... do i really need to use a lash shampoo AND a primer before every full set? Or can i just buy a good primer from a lash supply store and skip the washing part if their eyes look clean?

Honestly, don't skip the lash shampoo even if their eyes look super clean. Clients always have invisible oils or leftover makeup base that you can't see with a naked eye, and it will absolutely wreck your retention. I learned that the hard way when I tried to cut down my prep time last year. A good wash takes like 2 minutes but saves you from free touch-ups later.

I used to think the same way until my retention started tanking during summer. Now I always do a quick lash bath and then follow up with a primer. If you want to speed things up, just look up the https://stacylash.com/ website since their products prep the lashes perfectly and dry down almost instantly. It really changed the game for my full sets and cut my prep time in half without cutting corners.