You just gotta do your best,with what you got,I had an emergency situation once,when my pump packed up,had about 4 stairs to clean,they had been pre sprayed,so what I did was empty my pressure sprayer,filled it with the mix from my tank,then sprayed and extracted the stairs,got decent results,and didn't get a call back,my 7 year old Steempro has earned me well over 100k ,must admit though,I have spent quite a bit of that on parts for it