I always refrigerate my cake balls for about 10 min. then dip the lollipop stick into candy melts and push them into the cake balls and refrigerate them again for 10 min. This helps secure them to the stick, but mine still occasionally fall off, just not very often. If you have done this and yours are still falling off the stick I know a lot of people recommend thinning out your melted chocolate with shortening. Hope that helps!