In almost all areas there are also seasonal slow downs. At those time window cleaners often will offer "special pricing" to keep the work coming in. So pricing can fluctuate in your area. Not to mention that some cleaners get in a tizzy if they perceive that pressure washers or roof cleaners are lowballing them. lol
Tony some of the Guys want to learn the trade of window cleaning so I'm putting up some info on the trade. Cleaning windows on homes inside and out doesn't look like a big money maker. Commercial may be better, not sure. I for one would stay out of cleaning windows on the inside of a house. To many things to brake. For me, I don't do windows and probably never will.