A nifty tip I read before I started was to cover your scale with plastic wrap.
I take a piece and lightly lay it over the scale covering the buttons too. Then when I am done, toss it in the trash. It keeps the buttons clean and has protected the scale from spills and dribbles many times.
I change the plastic wrap after weighing lye (I do this outside) before bringing it back inside. I spilled some FO once and waited until I was completely finished with soaping and clean up to remove the plastic. It had melted onto the plate from the FO. I keep a paper towel nearby to blot in case I spill, but remove now it if it is something I think will eat it.
Digit