And also use mattress protector and the pvc mat to prevent leaking. When I was potty training my #1, I change/wash tonnes mattress covers, pants and plenty of underwear plus dragging him up to use the toilet at night because I jolly well know that he will wet his bed. Eventually he mastered it and he even know how to control/ wakes up to use the toilet. This takes me <3 months. Not sure whether it is consider too Long but the end result is, we did it!! Hahhahah