My rain jacket is a few years old and the DWR coating is no longer repelling water. I know there are a few commercially available products out there but I am always skeptical of things like that at first. Does anyone have any experience with any of them? Are there other options out there I am unaware of that are more of a cheap homebrew option that works well? I am not super concerned with keeping the jacket "breathable" as I mostly use this when commuting and I really do not push very hard so sweating is not a real problem.