u/Redreeee

I have a poke walker from when I was a kid, recently during Christmas my nephew took it and left it in his clothes without me or his mum noticing and it went in the washing machine, I let it dry and followed online instructions like leaving it in a dry cool place on a towel. I last Monday put a new battery in it and it started working again but only lasted a day and a half before it's dead, a new battery doesn't work. Does anyone have any idea how if possible I can get it to work again?