Goodaltgamer: To clean this mess you can either go the hard way with alcohol and those sticks you use for cleaning your ears,
or (to be used
with caution as it does not work for all keyboards)
you remove the keys from the keyboard, it is a bit like with the dentist, you can either carefully pull them or use good old lever force to remove them, put them into a big towel, so that they do not touch each other and wash them with your clothes in the washing machine on low temperature though. BUT not very producer does have a good paint on the keys, so it might diminish quicker. But you can also use this method to clean them easier with alcohol.
Plus when you removed the keys you can remove the dirt just below them as well.
Easier to put the keyboard in the washing machine.