A cleaning wiper blade for a moving grocery conveyor belt in the form of a thin sheet of paperboard, cardboard or plastic material having a length which is essentially the same as said width of the belt. The underside of the sheet includes first, second and third areas all having a width and a length wherein the lengths are substantially equal to the length of the sheet. The first area includes an adhesive thereon adapted to be temporarily secured to the frame of the conveyor and is covered by a release paper. The second area includes a porous member having a quantity of a liquid cleaning agent and a protective covering for the member to prevent the liquid agent from being released. The third area includes material capable of wiping liquid from the belt. The cleaning wiper blade is capable of being attached to the conveyor by removing the release paper and the protective covering and securing the first area of the sheet of to the conveyor frame with the second and third areas contacting the upper surface of the belt as it moves.