Why Are My Invisi Edge Tape-Ins Slipping Even Though I Followed the Instructions? Even when installed correctly, several factors can affect the adhesive hold:Hair was not thoroughly cleansed before installation.Conditioner or other residue remained on the hair.The extensions were installed too close to the scalp.Hair was washed within 24–48 hours after installation.Frequent sweatingAn oily scalpSilicone-based hair care productsIn addition, reusing the same tape without replacing the adhesive can significantly reduce its holding power.