I love using BuildTak, I would go through almost 2 sheets every year due to scraping of the BuildTak Spatula. I try to be as gentle as possible, but that spatula is pretty sharp, and scrapes the bottom very easily.
Before I print, I clean the surface with 99% IPA using a microfiber cloth. That usually works, lately I noticed nothing would stick.. I knew it was that time for a replacement..
I went to order more but got an idea “hey, what if I sand it down?” I looked around the house for fine sandpaper and found a box of 3M Extra Fine 3D Sanding Sponges
Went to the printer and with light pressure, scrubbed all around the build plate. I saw scuffs and the pad showed signs of plastic residue.
I cleaned the build plate again with 99% IPA and started a difficult print. and my surprise it was restored!!! I swear it’s like new! I thought maybe it was a fluke, so I attempted a my new design, Star Trek Ready Room Sign
IT STUCK SO WELL!!!
So scrub your buildtak with Extra fine sanding sponges!