For professional cleaners, there are many more ways to make money than just the routine weekly cleans. By starting to offer more specialist services, you will be opening up new doors and giving yourself brilliant new opportunities to make more money.
After party cleaning is one of those services that could be particularly beneficial. Lots of people want it around this time of year, with the beginning of Christmas party season. These are generally not going to be small jobs either, as many staff Christmas parties are held in large venues that will hold lots of people.
Begin offering this service and advertise it on your website to show that you have plenty of cleaning experience and that you can be booked in this field. If you do a good job, it should be a good time of year to get recommendations and to build up your work through word of mouth.