If your Wormery gets too wet from time to time you can simply add and mix in some dry shredded newspaper or cardboard.
Alternatively you can throw in a handful or two of these specially prepared wood based pelletised 'treats'
Made from 100% sustainably resourced and non contaminated wood waste, known as 'Ecowood' they rapidly absorb excess moisture, swell up and are readily processed by your happy Tiger Worms
In typical use a 1.5kg bag should be plenty for one Wormery for about 6 months (although it won't do any harm if you use more).
Whilst by no means essential, they are an entirely natural accelerator to worm composting and a handful added every 3 or 4 weeks will help ensure your Wormery stays sweet, well balanced and working at its best.
At this price for a 1.5kg bag they also represent great value.