Your bath mat should be getting washed regularly, because, after all, it's coming into contact with damp feet on a daily basis.
And while most households will be keeping on top of their bath mat cleaning, they may not realise how frequently the rug actually needs to be cleaned as swapping them out weekly apparently isn't enough.
Indeed, leaving the mats unwashed could lead to mould. According to Warren Kinloch from Bathroom Deal, they require multiple washes a week to combat the build up of grime.