Consider what you are protecting against.
If there are two of you sat in row 0 and one has covid, it's a good bet (in my opinion) both will have covid by end of flight, mask or not. Masks cut down transmission probability by some (disputed) percentage, but being sat next to another person for hours even small percentage chances start to add up to a significant risk. Particularly with the new variant.
If you are worried about contaminated surfaces, controls etc., a mask isn't going to help (much, it might, might, make you pause or stop when touching your face, probably doesn't prevent). My guess is that sanitizer is also a pretty bad idea due to the fire risk.