I had to replace a hose on the system so the pressure was at zero until I got it replaced. I had to refill the 5 gal hoding tank for the solution. When I filled it up, the hydrominder didn't pull product in for about 15 seconds so I believe I'm a little light on the foam solution. Would the concentration cause the brushes to not foam up? All that is comming out of the brushes is the liquid solution. Also, the air compresser is running constantly while a foam brush is selected.