My Mountain Designs "Pass" tent which had not been used for overnight camping for a few years was put into service over the March long weekend. When packing it up I discovered that the internal seam sealer tape has gone sticky and brittle in patches and is flaking off. In searching through the forum for information, I believe that my tent fabric must be PU coated polyester as the seams were sealed with tape that has reached its use by date. The tent fabric kept the rain off me with no leaks for two nights, but the sticky and flaking seam sealer needs attention before I use it again. What is the best way of removing the tape remnants? I have vacuumed all the loose bits off and are now left with the sticky bits. Can I use a solvent to clean up the remainder of the tape without damaging the tent fabric and PU coating?