Top up bin with fresh bedding to replace the compost removed. It's as simple as that. Firstly you will need to obtain one or more suitable worm containers, which may be either plastic, wooden or metal. Use your imagination and recycle an old bath tub or wooden box, drawer or a plastic basin, bin or crate, or alternatively buy or build one. Wooden containers provide good insulation and, because they are absorbent, excess moisture in the wormery may be less of a problem.
Plastic containers are convenient but have a tendency to keep the compost too wet at times.
Experiment and find out what works for you and your worms. A shallow container also allows for better aeration of the bedding. You can calculate the amount of waste you generate daily by collecting potential worm food in a container for one week, weighing it, and then dividing the weight by seven. Depending on size, drill or punch 8-12 holes about 10 mm diameter in the bottom of the container for aeration and drainage. Worms need air to live.