I just bought some shuttles (RSL No.1 Tourney) from a friend. I am pretty sure those shuttles were left in the trunk. So some the shuttles are stuck together, after I pry them apart with I find marks on the outside of the cork, caused by expanding and pressing into the feature stems. Some of the groves are pretty deep, looking like ripples.

Given the weather in Canada, I am sure our changes in temperature and humidity have a lot to do with this. I am just a bit worried if that will affect the performance of the shuttles. I wonder if anyone have had this problem?