So, I lifted off the pool cover housing unit lid. Cleaned out all the goop with a shop vac then washed it out with a hose. Now, when uncovering the pool when it gets fully uncovered its like the motor is making a horrible noise. I don't really need to push the button after its fully open but it just scares me as it had never done this prior to me cleaning it out. Any ideas of something I may of done?