Just purchased the VRX. Assembled everything and read instructions. Performed the first run and about an hour into the cycle there was an indication of dirty filter canister on the control unit and phone app. Performed the lift function and the filter basket had some debris. Cleaned it out and rinsed with fresh water. Resumed the cycle and in another hour had the same indication of full canister. Pulled it out again and there was only minimal sand or silt in the basket. There is a small rectangular sensor clear lens that seemed to be fogged up or had water. Is this lens supposed clear? Could this be water intrusion? Should I return for a new one? Seems to be an issue especially when the basket was not full. Basket contained minimal sand or silt on the screen. Please help.