do you have a thin fit case that pops off? I have one and refused to use it anymore because I lost one and I was sure that The new it would pop off too. However I've been using it for two weeks now with no problem by Applying clear RTV silicone (a pinhead worth) inside the case, just to the left of the spigen lettering inside . then just pop it on . It will keep it from flying off, yet if you want to take it off , it leaves no trace of any adhesive on the watch and then easily rubs off the case itself. Before I get the usual BS comments about gooping up the watch, then you don't know how RTV silicone works.