Any suggestions on crate potty training a puppy?

I have a six month old puppy who at times uses her crate as the toilet. I thought I had it solved when I took the bedding out, but I didnt. She can hold it for hours when shes just roaming the house. But I can leave her locked up for two and come home to a big puddle and a smelly dog. I have tried a million things and just when I think I’ve got it figured out she does it again.
I need help!