The joycons are egregiously priced. Doing any sort of fix on them is a massive pain in the arse. I hadn't used my Switch in a while, it was packed away in its (official) carrying case, inside a box that's kept in a decent environment. The joysticks had melted.
I bought replacement joysticks, with hall effect sensors, for €15. Two batteries for €10. Pain in the arse to replace, but it's possible. The new joysticks even have exchangeable caps so if they melt again for some reason, you can just pop them off.
Nintendo intentionally designs things to be shit, so you can buy new joycons at insane prices. It's why they also offer them in limited collections and whatnot.