They are the biggest money saver of all time. Micro fiber cloths are amazing and you can get three for under a £1 at tescos and they wash and wash. I use hot water and fairly liquid to clean everything, the bathroom, kitchen, walls, paintwork. I rarely buy other cleaners at all, only some ecover toilet cleaner.
Hot water and fairy liquid on a plastic bath will make it look like new.
All this ant-bacterial stuff is rubbish, hot water and soap kills most germs.