After you roll it up, where/how do you store it so that it doesn't get dirty?

Sweet Wise Response - THE MAT should be rolled up and stored in its original tube. At first, it is useful to save one of the paper sheets that come w/ a new MAT and roll that between the two sheets. This is only to prevent buckling and not necessary after a couple uses. Also, THE MAT stores best when you place matte finish to matte finish and then roll up. THE MAT has two sides, one side has double polish and the other side has a matte finish.