Cannabis is scientifically proven to be safer than coffee. It is one of the most benign substances in the planet.
If you are not smoking in the room directly around your glider, you literally have nothing to worry about.
If you were not in the same room as people smoking, than you are exaggerating and did not have a contact high. Contact highs are mostly myth, and the placebo effect (which is totally ok and normal). and unless they blew the smoke, directly in your face, it is incredibally unlikely that you were affected by the cannabis.
Rest assured your glider will be ok, but you do need to get him a friend. I see that as a bigger health risk than the weed a million times over.