I have two bed mats. I bought one of them to cut up and use to cover the tail gate, the mid gate [the tail gate because I like the mat, and the midgate because I think that's where most of my muffler noise from the 'ravin' is coming from] and the back of my Bravada. I washed both of them last week in anticipation of doing the cutting, one came out perfect and the other turned white everywhere the windex touched which was all over. Oddly, it left the stain where i sprayed it and did not smear the stain where i Immediately went over it with a broom. Any suggestions to get the white off?