If you are wearing only woolen covers, you will need about 3 or 4 so that they can be changed and allowed to air dry thoroughly between uses.
Use contoured / fitted / pre-folded diapers and change them frequently. Of course, your baby likes to have a clean, dry diaper. Frequent changes will help keep your baby’s skin healthy. Choose a diaper with enough layers to fully absorb the moisture.
Washing should be done by hand in warm water using a squirt of shampoo, baby soap, or coconut soap for wool. Insert the cover into a bowl of soap and water and gently shake it and rub the cover with your hands for just one minute. Then rinse with warm water and gently squeeze to remove excess water. Wrap in a towel and press gently for one minute to remove as much water as possible. Put to dry horizontally at night or away from direct sunlight and from any source of intense heat. NOTE: Friction and/or intense heat will cause the wool to begin to shrink! Handle with care and only use cold or warm water.
When you notice a slight urine odor after aeration/drying between uses, or if the cover looks less water resistant, it is time to lanolize. Add a squirt of liquid soap and a squirt of liquid lanolin (available from health food stores, reusable diaper shops or Amazon has the 100% Pure oil – for sale here) to a glass of hot water. Stir the lanolin to dissolve (if not, you can add more soap). Pour the contents into a bowl of cold/warm water, submerge the wool cover and soak at for at least 20 minutes, turning the cover over during this time. Then follow the instructions above for rinsing and drying.
For new wool cloth diapers it is advisable to lanolize 3 or 4 times before using for the first time.