Yes, the diaper should be washed before use to increase its absorbency and of course between uses. We recommend machine washing them on a long cycle at 40 degrees with a non-bio powder, as this will protect the longevity of the diaper as well as our planet. However, you can wash them at 60 degrees if you wish, for example if your baby has been ill. Fabric softener or conditioner can reduce the absorbency of the diaper so do not use these. Make sure the drum is no more than three quarters full when loading. Always pull out the inner towel to ensure the best possible wash, and stick the hook and loop tabs together before placing in the machine – this will prevent snagging on the diaper.