Some time ago I purchased an Ocedar spin mop and bucket. I love this thing.
The mop head is removeable and can be washed. You put it in the water on the one side of the bucket then put it in the spinner side to spin the excess water out of it.Lately the bucket's spin mechanism hasn't been working too well. Sometimes it will spin fine and other times not. I looked into just buying a new bucket but they all came with the mop. Then I discovered that you could purchase replacement mechanisms. I found a pack of 2 for just under $6 dollars on Amazon and ordered them. When they came I was surprised that it was just one small piece. I was expecting the larger piece as well. I was skeptical but tried it anyway.
It was super easy to replace and now the bucket works like brand new. I really didn't want to have to go back to the old sponge mops I've used in the past so I was thrilled that this one was fixable.
You can also purchase replacement mop heads for this which I did shortly after purchasing it. Now I have several that I switch out for washing.