Use a "did you wash them? hand washing stops the spread of germs (with handprint graphics)" sign. Not only do signs look good, they work!
Size: 10" x 7" Material Type: Aluminum (40 mil) Verified Purchase
Size: 5" x 3.5" Material Type: Adhesive Vinyl Signs and Labels Verified Purchase
Size: 10" x 7" Material Type: HDPE Plastic Sign Verified Purchase
Did you wash them sign
Brightly colored so it is noticeable and the perfect size.