If the weather in Cornwall depressed you in December you should have been up here in Northumberland!!!
I had 6 window cleaners on full pay with nothing to do for basically 5 weeks

I get depressed just thinking back on it

There are better jobs out there than window cleaning, just not many that give you the freedom of being your own boss, set yourself some goals, target new areas, make sure you look professional and the work will start coming in, no better feeling than getting a few new customers.