Question about my laptop keyboard where sometimes certain keys do not go?

This is so that the keys D, delete key and enter key only sometimes function, they suspend at any time and only go fleetingly after repeated actuation. This happens often, but after a certain time (usually a few days to hours) they go again without problems

Dust and crumbs are the suspects besides water damage. Can be cleaned with compressed air.

Should you remove the buttons beforehand?

Especially with compact notebook keyboards, the key caps are sensitive, so be careful. An alternative is to vacuum with a normal vacuum cleaner over the tube of which you have pulled fine pantyhose (if a button goes off). If you don't have any - try ankle socks from the shoe store.