Alright another update. I took all my cacti out of the soil and dumped all of the soil. Pretty much all of the soil in all the pots were still wet in the middle. I had those sitting in a room with a dehumidifier for about a week and the soil was still wet. Only the very small pots I had with the very small cacti I have were completely dry so those should be fine. I'm starting to think though that there might be a problem with the soil I have been using. I noticed that the soil has barely any rocks/pebbles/stones in it and it's mostly wood chips which I'm pretty sure retain quite a bit of moisture and can get moldy quite easily. Hell, the oxalis soil I had bought has more pebbles in it than the cactus soil I have been using. The soil is the Miracle Gro premium succulent and cactus soil mix. I think I should probably get a brand new type of soil. Are there any recommendations for good cactus soil brands??