Use pressure washer to clean!
Dive yourself in the world of the professional cleaners. Earn money by doing assigments, and use your profit to upgrade your equipments.
You're going to have hard time cleaning dirty items, this is why getting new cleaning tools is important. This is your main goal in the game, to evolve yourself and be the best!
Use the power of your pressure machine to complete jobs, and experience the different level of filth trough different environments.