Many people use a spin mop, but over time, either the mop or the bucket breaks down, but seldom both at the same time. Unfortunately, these are usually sold as a set. Moreover, they are quite expensive even when sold individually.
Well, as the title suggests, Taobao is your solution. I bought a replacement spin mop for 35 Yuan ($7.80). Inclusive of shipping cost, this spin mop would cost you about half the price of one bought locally in Singapore, so it’s a no brainer. The search term to look for a spin mop on Taobao is 旋转拖把.