I just brewed my first all grain 5 gallon batch(IPA) on Saturday night. I used a packet of US-05 yeast, and a plastic bucket fermenter. By Sunday night the airlock was bubbling rapidly. Tuesday night the bubbling stopped, but if you touch the airlock every couple of minutes it bubbles a few times then stops. I'm not sure if the beer is done because i fermented at a higher temp (78F). Since Tuesday i lowered the temp to 70F and it it still continues to only bubble when the airlock is touched. Should take a gravity reading, continue as normal, or maybe could something be wrong with the airlock. Please help!!!