I have an Aqua Clear 50. The last two times I did a water change it wouldn't restart when I plugged it in (yes, I prime it). I googled it and figured out that I can take a Q-tip, stick it in there and it will go again. It's less than 5 months old. Is there a way to clean it or do you have any other recommendations to avoid having to stick a Q-tip in there each time?