What should I do if the sofa cushions are sprinkled with water and turned yellow one by one?

In this case, of course, you should wipe the watermark on this mat several times as soon as possible, and then you can consider using some sprays, so that you can change this one back to its original color.

Then remove the whole mat and clean it, what else can I do, soak the mat in the laundry detergent, and then find the dirty position and rub it carefully with your hands, and then start the washing machine to wash normally.

There's really no good way to do this, so you can only wash it well. Because he is yellow, he can't clean it up.