Electric ULV Sprayer fogger Cold fogging Machine (10L)

I used this machine to clean and disinfect a small classroom and lobby area. I didn't fill it up as it is very heavy. It performed exactly like I expected it too. I highly recommend this.

Generally the product has been working as advertised. I bought 3 of them for my business and have only used 1 so far, so fingers crossed that the others won't have the issues the 1st one has. The issue that I am having is that the nozzle adjustment leaks fluid and pressure when closed or slightly opened vs. the other name brand ULV Foggers I have purchased. This looks to be a problem with the seal at the joint of the flow adjuster and the hose.