Hi hun, The first thing to check is that the tip is the correct size and shape for the nail. The curve of the tip needs to match the curve of the nail as closely as possible. Then make sure you are using enough glue, I alway find it's better to risk using a bit too much as opposed to maybe not having enough. Too much and you can wipe away the excess that squishes out, but not enough and you can't add more. What tips and glue are you using? Congrats on your job at the spa, How's it going?