I was wondering if anyone has a good link to something that tells me how I should be cleaning my camera/lenses (or advice). I've just been using the little brush with the bulb on the end and the lens tissues with whatever fluid that comes in the "kit". Is it good/bad to use those bottles of compressed air to get into the little crevices on the camera body/lens? I have had my camera at the beach on more than a few occasions and I have a slight gritty sound in one of my focus rings on my lens (I'm a total newbie and don't know what they are called so I'm calling it a focus ring...I'm sure you know what I mean). Is there a way to remedy that? Thanks for any advice.