I just threw away two quick-fade marking pens made by Unique. The looked like ballpoint pens but they dried out quickly. I do not recommend them. I'm going to watch this thread hoping there are some good suggestions. Finding something to mark with is an ongoing struggle for me. I've gone through a variety of marking pencils, chalks and pens looking for a dependable, washable (at least) marker. Most reliable is a well-used bar of white soap with a sharp edge. I KNOW that will wash out!