I have the A1 Mini as well. Mostly having sat unused since I bought it a few years back, I'm now wondering if the thing will function normally again. Any advice on basic "cold boot" maintenance? It's been a year since I last turned it on.

Shouldn't require much. Very light oil (ideally the oil that came with it) on the rails, wash the removable build plate with basic soap and water (may be dusty from sitting), and then run a test benchy to clear out any filament in the hotend.