jim its just not worth it for me to work for £20 an hour "on the glass" time.i dont have any work that earns me that these days.
average "on the glass" time a day is 5-7 hours.the rest of the time(filling up,driving in between jobs,admin,lunchbreak,talking to customers and a quick coffee etc)im not earning.throw in no holiday/sick pay,van costs,equipment,insurances,tax,bad weather days where i earn nothing at all eat into my earnings.
i once had the same attitude as you ( for years in fact!).treated the business as a "job" and guess what?i always seemed to be struggling financially esp when the weather was bad or unexpected van breakdowns etc.
im in this business to make money,provide a good cleaning service for my customers and provide a better life for myself and friends and family.
youll just bump along the bottom and just about get by if you dont raise your prices per job and get a better hourly rate for work done.i know IVE BEEN THERE!!!

at the end of the year after all expenses,tax and overheads have been deducted.THATS YOUR PROFIT!!itll be a lot lower than you think!!