I used to use dehydrator & Primer. Now, after proper prep, I only clean nails with alcohol(sanitize) and then wipe with acetone(dehydrate), then continue with my Rubberbase. Ever since doing this, I never had any lifting. Some of my clients stretch appointments to 8 weeks, with no lifting and a beautifull regrowth. In my opinion, I think dehydrator & primers, are unnecessary. It's just extra chemicals, money & a waste of time.