My Brinsea Octagon 20 advance ex's cover is dusty inside and the vacuum won't clean it. Other than removing the screws and dome, I don't know any other way to clean it. So, I called customer service and asked their advice. I was told to "use the stuff people clean their keyboards with." Huh? I turn my keyboard upside down and give it a shake to loosen the crumbs, and then gently wipe the keys with Fantastic. So, I told her I wasn't familiar with "the stuff people clean their keyboards with", she explained an aerosol can shot air to clean under the keys. Whatever! So, I asked what removes the bacteria and she apparently became annoyed because she responded sharply " what bacteria?" Uhhhhhh...the bacteria from the moisture, the dust, the slime...you get the picture, people...am I insane?????? She told me to just use the keyboard cleaner. I just hung up. She was rude and obviously preoccupied with another task because of the rattling in the background. I'm very disappointed with Brinsea's customer service, it was unprofessional.