It is recommended to use a zero residue detergent - liquid detergent preferably. Wash temperatures can be hot, between 145 and 165 degree F (65 to 75 degree C).
DO NOT use bleach. If required non chlorine oxygenated bleach can be used sparingly, provided the detergent should not already contain sodium percarbonate (the active ingredient in many oxygenated bleaches). The detergent must also not contain any Fabric softeners, Natural oils, Perfumes, Dyes, UV brighteners, Stain guard ingredients, Enzymes.
DO NOT add washing soda, soda ash or soda crystals to the detergent. The use of vinegar and/or baking soda can together or individually cause delamination.
It is highly recommended to add an extra rinse cycle since even minute traces of detergent or other washing chemicals which may not have been washed out from the diaper/product made from the PUL are highly detrimental to the film and reduce the life of the laminate.
Dry on medium heat, at a temperature not more than 130 degree F (50 degree C). Use of drying sheet with fabric softeners is not recommended.
DO NOT wring or iron on the film side. Any urethane film is affected by bleach, chlorine and dry heat exceeding 130 degree F.
Exposure to sunlight affects the urethane film. The film will turn yellow and crack over time. When the UV index is high this can happen in as little as 10 hours.