I've got a wavebox that I purchased in December of last year and I've had more issues with it than I expected. I'm wondering if it is normal or maybe just the unit. From day one I've not been able to adjust the wave to get any height more than about 3/4". As far as I know I have to have the pulse control set at around the minimum but I've had to set it at max in order to get any height. I've also had to clean it about every 3 months because it quits working but when I clean it there's nothing evident to cause the problem. Any help is appreciated.