I bought a round a few years back,some of which was horribly under-priced,I increased the prices by 50% and told the customers they are more than welcome to get quotes from other windies, as I can't clean them at the existing prices,I never lost one customer.The bonus is I saved a bit of money,I paid 3 x the clean,following the price increase the round is taking in an extra £150 per clean,=£450.Even if you were to lose a few the round will still increase in value if you buy under-priced work.