

My key cap cleaning process is an ultrasonic cleaner with a little dish soap, then if I want to speed up the drying process they get thrown in a dehydrator at 140° F (60° C). Otherwise air drying on a towel is perfectly fine if time isn’t an issue.
edit: removed redundant phrase


A reverse image search confirms that they were singing “The Wheels on the Bus” to a group of children. Most likely the part about the babies on the bus going wah, wah, wah.