When you empty your castings and compost, the worms will not be with the castings, but where the food is, on the other side of the Subpod divider.
Ants are attracted to dry conditions, so this is usually an indicator that your Subpod is too dry.
If your Subpod smells, it indicates that food is rotting before the worms can eat it or there is not enough oxygen in the system.
The great thing about a tray system wormery is that a: It's off the floor so very unlikely to be attacked by rodents and B: Worms compost waste as you add it so they really help to neutralise the odours. We have had no problems with rodents with Urbalive or other tray system worm composters.
Your wormery composter is particularly suitable for peelings and leftovers of fruit and vegetables, such as potato peels, apple cores, green tops of vegetables, etc.
Do not put intensely spicy foods into your worm composter, such as ginger or an excessive amount of citruses, as well as milk products, meat products, bones, oils, lard and other fats.
There are a few types of mite that love a worm composting kit and this is all normal and part of the ecosystem. However, as with most things if they start to take over the kit this can become a problem. There are two main types – a reddish brown mite and a white shiny round mite. Both are tiny and if numbers become huge they eat the food and your worms will tend to burrow deeper into the kit and this in turn stops the worms from reproducing as effectively.