I have a question, I'm drying on the network, I only have a bud, I have 20 C 72 Rh, can I use an oscillating fan and exhaust? I don't want to rui

i don't know what 'on the network' is.. got lost in translation. circulation in your drying area is good, but do not point any fan directly at the buds. Less is more. 72% is a bit high. You have higher risks of microbial growth 65% and higher. So, an exhaust may help with that unless it's just your ambient RH%, in which case you need a dehumidifier. Buds gas off a lot more moisture the first couple days, so it may resolve itself with time, too. But, in future you'll want to control that RH better or eventually you'll grow something nasty on your buds. 20c is fine. Cooler is good too. Choosing when to grow can help too. I only grow in cold months. It's much cheaper to add moisture than to reduce it or reduce temps to dry weed. Humidifier is 35w vs high expense of ac/dehumidification, which also generats a lot of heat at the same time. I just toss the humidifier in a cold room and set it to 60%.