Normally there will be such causes that the htv vinyl falls off the fabrics:

1, The heat transfer vinyl is not suitable for the fabrics, pls check the material instructions and confirm the correct htv vinyl.

2, the htv vinyl has bad quality in glue. Users need change the vinyl.

3, low temperature or pressure. readjust temperature and pressure

4, no adhesive or too much powder. use adhesive or clean extra powder.