scrub out of

scrub (something) out of (something else)

To clean some substance or residue out of the inside of something very thoroughly and vigorously. You'll need to scrub all the burnt food out of the pan with a scouring pad. I've got to scrub this gunk out of my keyboard, or it might stop working altogether.
See also: of, out, scrub

scrub something out of something

 and scrub something Out
to clean something out of something by scrubbing. Please scrub the gravy out of the pot. Are you going to scrub out the burned material?
See also: of, out, scrub