I wanted to share with you how I clean, mark and refill my Copic markers. Everyone has their own way of cleaning and refilling, this is just the way that I feel is the easiest. I purchased the 91% Isopropyl Alcohol at Walmarts and WalGreens. The Duct tape is by 3M. Remember that the dried ink could flake off your marker and stain you project you are working on.