Frisk, however, worries about their stitches. They don't want them to fly apart in the washing machine. Instead, after they're done with everything, Chara is plucked up again and brought into the bathroom.

There's a little plastic container, filled with a couple inches of soapy water. Frisk scrubs them off a bit, rinses them, and then repeats it. They're even grimier than they looked...

Their mother knocks loudly on the door. Frisk sighs, pets their hair again, and sets them down in the water before they head out.

...Seems Chara's going to spend some time soaking.