Once your worm bin has been going for a while, you may notice other creatures like white worms, springtails, sowbugs and millipedes living in your bin. This is normal, and these creatures will not hurt your worms. In fact, they help the composting process. The only bugs that may be present that pose a threat to worms are centipedes. You can tell centipedes and millipedes apart by looking at how their legs are attached to their bodies.
Centipedes have only one pair of legs per segment, millipedes have two pairs.
Unpleasant odors in a worm bin may result from too much food waste, too much moisture, or composting cheese or animal products. Control odors by removing excess or inappropriate wastes, making sure drainage holes are not blocked and adding more drainage holes or fresh bedding if needed. Always cover fresh food waste with at least one inch of bedding or worm castings. You may occasionally notice patches of mold or sprouts in your worm bin. Molds and fungi are a natural part of the composting process, helping to break down the food waste.