Discoloration
Egg crate foam begins to discolor once it's exposed to light. Due to a photochemical reaction, it will turn progressively more yellow over time. This process is hastened by natural sunlight, but artificial light will eventually produce the same effect. However, discoloration is an outward change and it does not affect the foam's longevity.
Signs of Wear
The cellular structure of egg crate foam will ultimately collapse, and as the material disintegrates it will stiffen and crumble. An egg crate mattress topper can break down more easily because of its function. Since they typically have a thickness of 1 to 2 inches, they are too thin to withstand long -term use. As the superficial layers of foam give way to body weight, there is less material to compensate for their loss and provide support. Since heavier individuals exert more pressure egg crate foam, they are likely to wear out the material sooner. An egg crate foam mattress pad typically lasts anywhere from 18 to 36 months.
Maintenance
You can postpone replacing egg crate foam by keeping the material clean. Periodical cleaning of egg crate foam will rid it of foreign particles that can contribute to its deterioration. Vacuum the egg crate foam to extract impurities like dirt, pet dander and dust mites from the pores. Steam clean the egg crate foam to lift deep-set grime. Egg crate foam is a flimsy material that cannot endure conventional cleaning processes. It cannot be laundered in a washing machine and it will melt in the dryer. If the egg crate foam ever gets wet, make sure it dries adequately in the open air. If it does not dry properly, bacteria can grow and destroy the foam.
Bottom Line
Generally speaking, more expensive varieties of egg crate foam are fortified to last longer and some may even contain antimicrobial additives. While economically priced egg crate foam is common, it will surely wear out and need to be replaced sooner.