I have a Tarptent StratoSpire 1 and StratoSpire 2 (yes, I like he model!). When new, water beaded off the outer (both sides i.e., from rain and condensation) recently the SS1 which has done about 90 nights stopped beading (I am guessing it happened slowly - I just didn't notice it) and now when it gets wet (either side) the material is more like a 'wetted out' rain jacket.
This means a quick shake doesn't get rid of most of the water and the tent says wet forever and when packed the wet outer soaks the inner, which is not nice when I set up at dusk later that day! It has been such an issue lately that I have started taking inner down separately, which defeats the object of having an integrated pitch tent!
Is this just what happens to Silnylon over time and is there anything that will restore the water-repellence?