If you're going to use a solution-based cleaner then do it sparingly.
My method is a dry stylus cleaner after every side. I got a very nice one included with a My Sonic Lab cart. Then, once a week I use a solution from Audio Intelligence--Enzymatic Stylus Cleaning Formula. It was recommended to me by the J.R. from Wally Tools. He sees a ton of carts, so I figured it's good enough for me.
My two cents.