i prepared my subby solution for the plugging next day the other night, leaving in an a small shot glass- uncovered. the next day when i plugged it it didnt really seem to work. did the air fuck it up?
i doubt the air would have any effect. next time backload your crushed up powder into the back of the syringe using a funnel made from a magazine cover and tape. that way you don't miss any trace amounts of your DOC in the shotglass.
it's quite unlikely unless that it lost much potency, if any at all. if you left it out in the open air under a lot of sunlight for a longer period of time then maybe it will have lost some potency.
best way to go about it is cover it up (airtight) and leave it in the refridgerator until you're ready to dose. it's best off if you prepare it closer to the time of administration.