I use the 70% for normal wound stuff, but need the 91% for cleaning the glass bed of my 3D printer.
The glass I use has a fine mesh grid on it so the prints stick better to prevent warping. I've tried using Acetone once and it destroyed the mesh after 2 times. I've also tried Windex and it will wear out the mesh pretty fast. 91% alchohol seems to work the best from the things I've tried so far.Can you not use acetone or methanol for the 3D printer cleaning? Acetone is widely available at the hardware store, and methanol can be found at racing supply stores for about half of acetone's price. Methanol needs you to wear a couple pairs of gloves to prevent it from getting on your skin however