What's the best tape for heated bed ...

What’s the best tape for heated bed … The stuff I have keeps pulling up when printing

what plastic are you printing with?

Pla

Genuine 3M seemed to work the best of the tapes. But does it have to be tape? The limit of tape is going to be the adhesive. Glue stick or a thin layer of white glue (dilute one part white glue with 8 parts water, evenly wipe onto build plate) can hold very well. Repair is just another wipe.