Have you checked the amount of detergent used? Have you used fabric softener?
■ Using more than adequate amount of detergent will generate excessive foam and rinsing may not work.
■ Liquid detergent or natural detergent forms a considerable amount of foam compared to normal detergent,
therefore rinsing may not work.
How to fix
<Detergent and fabric softeners>
<Only detergent is used>
<Detergent and fabric softener are used - Foam is washed away>