What Should I Do If a Tape-In Falls Off After Only Two Days? Possible causes include:Oily hair or conditioner residue before installationThe tape was not pressed firmly enough for at least 30 secondsAn issue with the tape adhesiveWhat to do: Keep the fallen extension and contact the store or seller for assistance with a replacement.Do not: Apply regular double-sided tape yourself, as it may have a different adhesive composition and is not designed for hair extensions.