FAQ Search Select a Category Cleaning Formulas Cleaning Tips Corporate Deep Cleaners FAQ Hard Floor Cleaners Parts and Accessories Steam Sweepers Vacuums Warranty Web Site and/or go My Big Green Complete® collection tank keeps overflowing. What should I do? Answer: Please check out our easy steps to get your machine working properly. -The widest part of the float should be at the bottom. -Make sure the float isn’t stuck at the bottom. Don’t forget the float should move freely up and down.