First of all, follow the manufacturer's instructions on the laundry label. We recommend washing clothes for babies/newborns separately, as there may be allergenic substances in or on your clothes. We also recommend that you always avoid using fabric softener, as this can irritate your little one's skin and prevent possible allergic reactions. Another recommendation is to use a sensitive fabric softener, especially if the clothes can only be washed at 40°. Hygiene rinse agents remove 99% of the bacteria even at very low temperatures. For children's clothes, use a detergent labelled "Sensitive". You can find a lot of useful information about textile care for children's clothing here.