Paul, these directions will help those whose scroll wheel is acting up due to build up, however microscopic, on the axle.
I’m not sure if there’s much else that can be remedied with this mouse short of replacing it.
For anyone who has stripped a screw in step 8 this note might make your day. I stripped the longer screw using a #00 bit. I then took a 1.5mm flat head bit from the iFixit screwdriver kit and rocked it along the line of the flat head into the stripped screw head, with some pressure a few times and that created enough of a depression to easily remove the screw. There was even enough purchase to reinstall it securely so no need to hunt down a replacement screw.