I hate to teach my kids the right way to clean their rooms.. omg the stuff I'm pulling out of toy boxes and from under…

My kids is 13 and I still have this problem. I have to sit in her room while she cleans to make sure it's done properly. Same with her other chores

Oh my... I am having to clean out my sons room so I can take down his old bed and put in the new one.. and I'm throwing a lot away / giving away.