You will soon see if your worm composter is too wet – it looks visibly sodden.
Cardboard is great for your worm composter (as is a sprinkling of lime mix) A ratio of 25-30% volume of shredded cardboard or equivalent will ensure the compost doesn't get too wet and there is air circulating. Avoid the really shiny boxes like soap powder and go for newsprint, egg boxes etc.
If your wormery is too wet, there are a few things you can do to address the issue:
Our composting worms are mixture of species (mainly reds and dendras) selected for their composting ability
The Urbalive Worm Composter is a home wormery kit that can be used indoors or outdoors for composting kitchen waste with the red worms. The perfect wormery for households, classrooms or offices.