Toothbrush and isopropyl for what is in the image. Sanitizes, and dissolves most stuff. Remove the battery first for safety and don’t put it back until it’s completely dry. Toss the key caps in a bucket with some soapy water and rub around to clean them. More toothbrush action if anything is stuck on them. Air blaster for the vents. Plastic tweezers for any visible stuck bits. More Isopropyl and towels for big flat areas, like the case/screen.