I've read up and down through all the Steripen threads, but I am stilling having some issues with using it. Briefly, I recently bought the pen to replace my Katadyn Hiker when I am in areas where water is fairly clear (Sierras) and I don't have to drink from cattle ponds (Henry Coe, etc.). The Hiker has been my reliable friend for a long time, especially since I'm not a chemical person. However, the recent REI sale got to me and I couldn't pass up the weight savings.
What I am struggling with is the prefiltering. I purchased a wide mouth 32 oz Naglene Canteen to use with the pen. I plan to decant to a platy if I need some additional liters for longer stretches (just using a cheap little funnel to decant). After looking at several coffee filter options, I gave up, cut a small square out of an old white t-shirt, and used a rubber band to fold it over the mouth of the canteen. It seems to work in my home tests, but I have yet to hit the trail with this setup.
Does anyone have any thoughts on what I am doing? Are there problems anyone sees with this method of prefiltering? Should I give up and go back to my tried and true Hiker?