Plastic dish drainers are usually sold in one piece or three-piece sets. The three-piece sets of drainers contain a drainboard, rack and utensil holder. However, plastic racks can easily wash and maintain in the same way one does for the dishes that get dry on the stand. Thus, it’s an easy task of cleaning them which needs to be repeated often, if you use it regularly for drying clean dishes. So, while washing, fill the sink with warm water. And add ¼ cup household bleach with dish detergent. Now, place the drain board as well as a utensil holder in the sink. And allow it to soak for 10 minutes. Next, scrub the rack on both sides using the sponge. And rinse in clean water and place on a dishtowel. It needs to be placed on a flat surface for air drying. And you are all done with cleaning!