After owning A N3DSXL since launch and playing MH4U on it very regularly, my N3DSXL's R button is starting to not register that I'm pressing it. Sometimes it'll work just fine, then suddenly it'll stop registering that I'm pressing it. Cleaning the area around the R button really doesn't seem like it'll help, since there's nothing dirty to clean off of it.
Anyone else ever had this problem? Any other ideas I could try before asking to get it repaired?