I saw other posts where individuals have bought parts to fix the polaris 65 due to it going in one direction only. I have a polaris which was only going in one direction, I found a FIX. The fix is to take the unit apart, and remove the randomizer. The randomizer separates in the middle to reveal an internal filter. Cleaning this filter solved my problem. I removed the bottom black unit, and pulled the randomizer down which then separated. I cleaned the sand and dirt out of the filter and re-assembled the unit. It worked.