The secret of compost is the balance between wet matter (peelings, coffee grounds...) and dry matter (cardboard, paper...). We often forget that cardboard is very important: it aerates the vermicompost, regulates humidity and makes a great bedding for the worms: that's where they reproduce. For better digestion of bio-waste, cut it into small pieces. Vermicompost is more efficient than compost, but also more sensitive. Avoid adding animal matter (milk, meat), fats (oil), citrus fruits and Alliaceae (garlic, onions, leeks, chives, etc.), which have vermifuge properties.