Joy-Con can't be pushed into the console properly?

As
- in Nintendo
2

For a few days now, my visiting little cousin has been playing Nintendo Switch all day. Now I had it in my hand too. But now the left Joy-Con can only be pushed into the console with a little pressure and pushed out with a little pressure. While everything is normal with the right one, the left one just hangs in a few places. I have had the console for 3 months and I'm extremely careful with the console, which is why I'm totally angry that the left Joy-Con is hanging like that. What can I do now? (Well, it doesn't affect me while playing, but it just bothers when you put the controller in or out.

Co

Try washing the controller and the switch with a cotton swab with a little water.

Otherwise, cotton swabs with nail polish could help.

But you should "dry it off" again with a dry cotton swab.

As

What exactly is this supposed to cause? It's all about this sliding part.