The way i use mine is as follows...from about 3" away from LP or disc i slowly pull the trigger as i move the gun back from the object to about 12". At that point i have timed it so that i have completed pulling the trigger as i reach the 12 inches away "mark", all that time keeping the gun pointed at the LP or disc. I then slowly release the trigger releasing the negative ions on the the LP or disc. When i used it on dusty LPs it took a few full cycles of trigger pulls to get the brush to finally pick up the dust rather than just sweep it around like you are experiencing, cleaning the brush after each revolution of the LP. It is my understanding that one needs to pull and release the trigger at the object too effectively discharge static, otherwise you only are positively charging the object. I have had good experience with it, i don't think it should cost 100 bucks but i don't believe it is a waste of money.
I tried testing mine with the bulb on it against a faucet too, i didn't get great results either. I then tried it against the gas pipe that feeds my furnace and got great results.
I tried testing mine with the bulb on it against a faucet too, i didn't get great results either. I then tried it against the gas pipe that feeds my furnace and got great results.