Fan Jets Failed but at least its got a second pair of jets built in.
This was our first brush. We were ONLY using the fan jets at first as we heard they were better for hydrophobic glass. Then one day something failed inside the jet and they no longer preformed well. I am not sure if they got jacked from scrubbing cutups or what exactly happened. Luckily it has another set of jets and we were able to finish the job. However we realized that pencil jets work just as well as long as you make sure to rinse it well. The pencil jets are not plastic they are made from solid metal. We will be mostly sticking with pencil jets from now on as they seem to be more reliable.