OP said he has already been drying for 4 days, mine are usually smokable by 5-6 days anyway. You should be close and ready to cure or smoke. At this point just get the fan and put the buds in paper bag and blow the fan just across the opening of the bag so your not blowing directly on the buds but pulling the air out of the bag basically as the wind blows by and maybe in the bag a bit just not full force. I have gas heating in my house and it keeps the humidity way down so you may have very high levels keeping it moist longer. Also if you haven't already done so trim as much of the stem away as you can as this is where is getting its moisture from, you can also stop hang drying now and lay it on some cardboard to pull moisture from it