Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nozzles

I've used the Karcher 2400 now for over one month and it is a dependable machine. The 5.0 Honda engine runs and works like a charm, and I do agree with a previous review that putting oil in and changing it is a pain. What I am having a problem with are the quick change nozzles. I am an owner of a hand car wash and I use the washer exclusively and often. The problem I am having is the nozzles are becomming clogged all too frequently. The are not being submerged in water in soap, it just seems after prolonged use, the pressure is not there. I know it is the nozzle because when it is removed and I squeeze the trigger on the wand, the pump activates and pushes the water out at pressure. The engine does not go through any undue labor, and when I adjust the choke with the nozzle on, the presszure comes back. I have to do this every time when I come off of the trigger. I am investigating as to if there is a better and more durable nozzle that I can get. If anyone knows, please let me know.