How to prep for manicure? Trim and shape the nails, push back the cuticles gently; Buff off the surface gently; Wipe down the nails with gel cleanser or remover. Beware: It's important to ensure your nails are completely dry, clean and oil-free. How thin/thick should I apply? When you apply, please make sure you've applied thin coat each time. Keep in mind that you could always add one more layer for deeper color. How to keep gel nail polish for long-time using? 1. Please make sure the gel nail polish in the bottle has ZERO exposure to ANY U V/LED lighting. 2. Store the bottles UPRIGHT. Storing it sideways may cause gel leak out. 3. Don't mix the brush with other gel color or related product. Why experiment chipping or peeling issue? 1. Please make sure your nails are thoroughly clean, dry, oil-free before applying. 2. Too thick or too thin coats would cause chipping/peeling. 3. If there’s gel on the skin or cuticle, the gel would lift at that point too.