Hi Morris,
There are only 3 ways to make more money:
1) Reduce your costs.
2) Put your prices up
3) Get more customers.
We can discount option 1 because you probably dont spend a great deal on equipment and consumables (besides I'm assuming you are aware that you'll get the best prices from Express Cleaning Supplies anyway
)
Option 2 is something to consider - when was the last time you put your prices up? Do you know what your competitiors charge? Are you really charging enough for what you do or is there something else you could offer which could be charged extra for (do they want the frames cleaning or perhaps facia boards etc?)
The biggest impact would come from option 3. I assume that if you have the capacity to clean their windows three times as often then you have the capacity to triple the number of customers you could deal with.
On average, how long do you keep each customer for?
What is your average charge each time you clean them and how much time does it take?
My initial suggestion, depending on the above, would be to offer a free clean for every new customer your existing ones refer to you. If they're happy with your service then they are doing their freinds and family a favour by recommending you and it's a win - win situation!
One other thing to consider is with regard to advertising -
realistically what proportion of your potential customers know about your services? Do you advertise just occassionally or do you really keep your name cropping up in front of them time after time?
An interesting excercise to do is to take a morning out and knock on some doors with a leaflet. They key thing though, is to ask them if they already know of you! It can actually be quite encouraging when the majority say no because it confirms just how much more potential there is out there!
Hope this helps
Regards
Mike Boxall