I've found my biggest issue is that over many months it gets a thin film of grime deep inside that I have to pick out with a needle to make it work again properly. Micro and C both, but with C it's way easier to break the contacts while cleaning.
Wooden toothpicks are often too thick. My swiss army knife has a flat plastic toothpick that seems to have been designed exactly for the job of cleaning USB-C ports: https://i.redd.it/79iesas532521.jpg