If your worm bin starts to develop problems, you should remedy them as quickly as possible. Worms living in unsuitable conditions can die quickly, so it is essential that you do everything you can to ensure their health and keep them producing high-quality vermicompost. Most potential problems arise from moisture or food-related issues. When considering your worm bin, you must realize the importance of balance. Too much of anything your worm bin needs can be just as bad as too little.
Check the moisture level of your worm bin, as well as whether or not it has adequate drainage. Make sure the bedding is about as moist as a wrung-out washcloth, but no moister.
Make sure all food scraps are buried deeply within the worm bedding. Avoid leaving any food exposed, as it can attract both insect and animal pests.
Monitor how much your worms are eating in a day. Feed them only as much as they can handle in a day to avoid bad odors and pest problems. Do not skip feedings or the worms may try to escape and/or die.
Cut up all the food you feed to your worms into small pieces. Note that worms do not have teeth, so cutting the food into small pieces will help them eat it more quickly, according to Cornell University's Waste Management Institute.
Mix 1 cup of apple cider vinegar with 3 drops of liquid dish detergent in a small bowl. Place the bowl near the bin to attract and kill fruit flies. Affix flypaper to the inside edges of the bin for a combined attack.
Add dry bedding (shredding, cardboard, old newspapers) to your worm bin and mix it in thoroughly. Mix every day, trying to discourage pests, encourage worms, and maintain a good moisture balance in your bin.