Two things I have noticed...after using the first one for a week, the little water thing does tend to get dirty just from dirt blowing in, not chicken poo...so every other day I just take the hose and spritz the little bowl to get the dirt out, or...if you are stronger, you could just tip it a little and brush the dirt out...
also...make sure you put the cap on tight...otherwise it does not make a vacumn and it WILL leak...
but if you follow the instructions...they really help on these hot summer days