Weather's been nuts, then out of town for two weeks, pulling out the drone for tomorrow from the backpack, and noticed there is fluid of some sort on the top of it near the antennae, it seems a little oily. No, I don't have anything else in the pack and have no idea where it came from, it's not much but enough that it's noticeable. Any ideas? I've checked no cracks or anything, have less an hour on this.