yes..... they have sent me new QD because one was cracked. out of the box. and another one was as well which i replaced.. It just seems like low pressure
You have to find out where the slow-up is. Take off the dema valve and run your spray, if it blasts solution, put on the dema and see if it blasts at that point, if not the dema is clogged. Take off the spray nozzle, could be slow there. Try a bigger spray jet, a flood jet.