The above picture shows a Pedigrid ® that requires cleaning.  The traffic pattern is readily observed, where the carpet strips are matted and saturated with ice melter and dirt.  In its current state, the mat will not effectively wipe and soil will be tracked into the interior. 

The cleaning process begins by removing the Pedigrid ® to gain access to the recess area, which acts as a collecting bin for dirt and salt.  

The amount of dirt in the recess can be substantial depending on the amount of traffic, use of ice melter, and length of time between cleanings.   In this case a chisel must be used to loosen the built-up of dirt and salt deposits.  Odors also are eliminated by cleaning the recess.

Corrosion occurs even on aluminum when not cleaned frequently.  This can lead to structural weakening of the mat, resulting in further maintainance issues. 

A close-up view of the carpet inserts near the door shows ice melter "caked" onto the carpet fibers.  

After cleaning the Pedigrid ® inserts are able to remove and absorb dirt effectively.   

The cleaning process eliminated the traffic pattern of dirt and ice melter. 

The channels between rails are now clear, allowing more debris to be collected.