Cars, ovens, carpets....all been done to death and everyone's trying to undercut the next one ( That last sentence above is very true ), but...everything gets dirty and therefore needs cleaning. Got a couple of window cleaners round here doing OK, could do with charging a bit more tbh. It all depends on density of population and any competition. We set up a laundry in a one horse town cleaning bedding for the tourist trade 10 yrs ago, cant really complain in all fairness, work about 3 days a week, maybe 4 in the height of the season.