3-4 days is good. I would flush last two waterings with lot of water. Soak it and then flush with few galons of pHd clean water…
About the smell and taste. You might be too afraid…I get that you are alergic to some molds but that might be the main reason why you end up with such a bad buds You probably dry too Fast and then you try to add the moisture with humidifier which is wrong. The important stuff is to let it dry sloooowly to break down the cells and chlorophyl. Oils and terpenes are then released to the Buds which replace the water. Buds are dry and stems snap but still sticky to the touch look at my buds. They are completly dry and every stem snaps but they hold together because of the stickyness