To any of y'all that have (Old 3DS XLs with) loose Styluses, just add a small amount of tape (not like, duct tape) to (preferably) the start of the slot!

To any of y'all (that have Old 3DS XLs) with loose styluses, just add some (a small amount of) (thin) tape to the slot! Removing the back plate is suggested, but not required!