2 years and 7000.00 later. I called and asked if a representative could come out and go over the operation of the windows. I have having trouble with the cleaning process. I was told it would be 79.00 charge or I could try a u tube tutorial. Nikki was the customer service rep. I asked to speak with Adam the window manager. He would return my call to discuss my issue. 48 hours later and Im still waiting. User's recommendation: The sales rep will promise the moon. Caution.