I've been using for a while a Celestron cleaning pen. I like cleaning pens just because they are practical, no liquids, can use them in the field if needed. The problem is that the cleaning pad is too large to be of any use with short-focus eyepieces. The Plossl 5mm I often use on Mars, for example, gets dirty very easily and I do not want to disassemble it every time I need to clean it (which is often).
I remember seeing somewhere a cleaning pen with a double pad, one large and convex as usual + another with a conical tip that seemed just perfect for the job. I've looked around on the web but for the sake of me, I cannot find it anywhere. Does anyone know it?