I've started using the NSI secrets soak off system for extensions and I've been having some issues. I have used it on 2 friends, the first one is a nightmare is keep any type of nail on so I don't really count her. However, I did a set of tips for a friend that they haven't even lasted a week. 2 have just completely come off and the others are cracking. I always spend a lot of time on prep so am not sure what's going wrong. Has anyone else had issues with this system? I have bought Brisa lite sculpting to trial so hopefully I'll find it works better!