First off, this bug zapper WORKS AWESOME!!!!! Is it clog proof like it says, NO!!!!! For the average yard it probably is but when you are killing 10-20 bugs per second (yes per second) it has no choice but to plug, I live in the country, and after a month of every day rain equals lots of bugs. I am about to purchase at least 2 more, not sure which size yet but mine is 10+ years old and have never replaced anything. If you are looking for a bug zapper this thing WORKS!!!!