What is a sticky mat used for in a cleanroom environment?

A sticky mat is specifically designed for use in cleanroom environments to effectively remove dirt, debris, and particles from the soles of shoes before entering a critical area. This is a crucial practice as it helps maintain the cleanliness and integrity of the controlled environment by minimizing contamination from the outside. The mat's adhesive surface captures and holds onto contaminants that may cling to footwear, thereby preventing them from being tracked into sterile or controlled areas.

The other options do not align with the primary purpose of a sticky mat. While decoration may have aesthetic value, it does not serve the operational goal of contamination control. Controlling humidity levels is important in cleanrooms, but this function is typically achieved through HVAC systems and does not involve sticky mats. Providing cushioning underfoot is also valuable for comfort, but it is not the primary function of a sticky mat in a cleanroom. Emphasizing the role of sticky mats in contamination control highlights their essential contribution to preserving cleanroom standards.