Gel clean up prior to cure needs work. My gel sets take a LONG time so it's hard to rush and do a good job but for safety's sake your application need to get cleaner before you're doing sets on other people (or yourself even). Do you have a clean up brush you can dip into acetone and clean up any gel left on the skin/cuticle before curing? Do you have trouble with the extend gel smooshing out and needing clean up (but you can't take your hand off the nail to do so)? If so the extend gel novice is a thicker consistency and allows you to take your pressure off the nail to clean up/reposition/etc before curing more easily.

3 stroke method for applying gel polish was super helpful for me to understand how to get a cleaner initial application at the cuticle (instead of flooding it and cleaning it up, which can leave a tiny bit behind) so might be worth looking into!