Been there with the foggy lens struggle, it's such a facepalm moment when you finally get it. My old place had a tiny bathroom and I spent weeks thinking my camera was broken. A quick wipe is a total game changer.

Wondering what your setup looks like when you check that drift, are you zeroing it on the saw table itself or on a flat reference? Because if the table has any sawdust or a burr on it, that 0.2 could be the surface and not the gauge. Have you tried marking a line on the table and rechecking the same spot each Monday to see if the number moves around or stays put? Curious if the drift is real or just the gauge hunting for a reading.

The cart return at Highway 9, not the dumpster?