Problems w/ Nitty Gritty RCM?


I was having a lot of trouble with surface noise on new vinyl. Before first playing my new LPs I was giving them a wash with my Nitty Gritty 1.5Fi, but I was still getting a lot of pops and clicks. In an attempt to discover the source of the problem, I stopped washing new records and just giving them a dry brush before first playing. This has reduced the surface noise quite a bit.

I'm wondering, is there something wrong with my Nitty Gritty, possibly something abrasive in the brush? Has anyone else experienced this?
gradys
In response to an email from a member asking me to list the records that I have had problems with, in the hope that some members have had similar surface noise problems and can identify them as bad pressings, here are some of the LP's that I cleaned with the RCM and experienced a lot of noise:

John Lennon - Imagine 180 gram
Rolling Stones - Let It Bleed 180 gram (import)
Billy Joel - The Stranger 180 gram
Bob Dylan - Time out of Mind

Sorry, I don't know who made the actual pressings, but if anyone knows any of these to be from particularly bad batches, that would be helpful.

Albums I've bought and have only cleaned with the brush that are nearly silent:
Flaming Lips - At War with the Mystics 180g
Flaming Lips - Soft Bulletin 180g
Sonny Rollins - Bluenote 1558 vol. 2 200g
Beck - Modern Guilt 180g
Apples in Stereo - Travelers in Space and Time 180g

I guess I should also point out that I'm not trying to blame my RCM for bad pressings. I realize that noisy records are out there. It's just there seems to be a correlation between cleaning and noise. But, as they say, correlation is not causality. What I'm really wondering is if anyone else has had similar problems with a newer model Nitty Gritty, so that I can hopefully either eliminate or identify it as the source of my problem. Thanks guys!
What fluid are you using with the machine? I had the exact problem you had. ecords were much noisier after the wash.
I've used Nitty Gritty machines since 1982 and NEVER experienced the issue you
described. I've used them on new records and used ones. I now clean them
with Last brushes and AIVS fluids (a three step process winding up with a rinse),
but even when I used one-step solutions there was never a case where the
cleaned record sounded worse than before it had been cleaned.
Genesis168 - I'm using the stock solution nitty gritty provides - Purifier 2. Are you using a Nitty Gritty?