What are the consequences of a washing machine quilt indicating dry cleaning?

I have a king size quilt and the price offered to dry clean start at $ 50.

Rinse with cold water, stain pre-treatment, find a place to hang to dry. The worst that will happen, if you have real feathers to stabilize, if you have puffy things, not sewn, it will separate and join up. Next time, buy washable.

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