My 3ds won’t read my games

Whenever I put a game into my 3ds. Nothing pops up but it saying “please insert card” I don’t know what’s going on. This has been happening when I first received it. Please respond fast I wanna play on my 3ds

Try using a cotton bud and IPA on the game chips. Then insert the game into the ds about 10 times. See if it works then

I did that. Nothing happened?