Duck tongue cap can not be washed with a washing machine. Cleaning duck tongue cap do not use washing machine washing, will be deformed, hand wash is better.
Cleaning method: first put the duck tongue cap in the water to soak for ten minutes, and then use a soft brush dipped in soap or soap to gently scrub, duck tongue part of the same. Note that the hat inside the circle of contact with the head of the side, it is easier to dirty, can be coated with some soap, and then use a soft brush to scrub carefully. After scrubbing, soak in water, rinse the soap, and dry it.