Thanks for taking the time to leave a review. When using additional cosmetics with Plexaderm Rapid Reduction Serum, water-based products work best. Try mixing 1/3 liquid foundation or concealer with 2/3 Plexaderm and apply with your fingertip. Allow the Plexaderm/foundation mixture to set for 10 minutes. All makeup brands are different so you may need to adjust the Plexaderm-to-foundation ratio until you get the desired results. The Plexaderm formula is quite powerful and if too much is applied you may experience dryness, over tightening, or even see residue. I recommend trying a smaller sized application and spreading it out evenly. Please allow a full 10 minutes for Plexaderm to dry. If you are still experiencing residue, try dampening a cotton ball/swab and gently pat on the areas of concern, this will help take away any unwanted product. Should you need further assistance, please give us a call at 1-800-681-0366. We're happy to help!