Hi guys and thanks 420 for this amazing website. Ok so this is my second grow I'm growing in a 4x4x7foot tent and a 600hps. Everything goes well until I start drying my flower. I cant get rid of the hay smell . This is how I dry . Flushed for 2 weeks 1 heavy flush with 3 times the water and then regular watering with unph water close to 7 3 more times then following 48-72 hours of darkness soil is a little damp when I chop plants. Then I break into branches cut fan leaves only and hang in tent . Now for my tent i have a portable ac outside the tent that I have connected a duct and goes to the tent blowing with around 250cfm maybe a bit lower and kicks on whenever it needs to like every 20 -30 min for 5-10 min to drop temps down to 65-69F also I have a 30pint dehumidifier (cfm around 180) in grow tent to control rh and a small issolating fan always on to circulate air from dehumidifier and humidifier and to circulate air underneath buds when ac is of . No extracting fan(outtake fan) only a 6" whole that air goes out when ac goes on as to i dont have issues about smell so no carbon filter needed. All smells good until day 3-4 and after that hay smell kicks in and I can't get rid of it. I usually dry for 7-10 days then dry trim then into jars and burb as needed. Drying temperature 65-69f and rh 55-65. What am I doing wrong ?? To much air going in tent?? Drying to soon? . Keep in mind that everything that blows air(ac dehumidifier and isolating fan are not pointed on buds and buds are hung almost 2 feet above ) .Any help would be awesome and thanks again .