FAQ Search Select a Category BarkBath Cleaning Formulas Cleaning Tips Commercial Products Corporate Deep Cleaners Hard Floor Cleaners Mops, Brooms and Brushes Parts and Accessories Steam Sweepers Vacuums Warranty Web Site and/or go Why is my Upright Deep Cleaner Foaming? Answer: What formula are you using? We recommend only using BISSELL Upright Deep Cleaning formula. Make sure you aren't using any manual formula in the machine because it will foam over. Related Questions My ProHeat 2X® won't stop spraying. What can I do? The belt on my ProHeat 2X® just broke during my first use. Is there anything I can do? My DeepClean Essential® is leaking. What can I do? My ProHeat 2X® leaves dirty water spots on the carpet. How can I fix this?