I talked to Lone Star today. They said that they have not had any complaints about the Leather except that it takes longer for the aroma beads to soak it up. She had me send an email with the ingredients and process that I use and was going to call the manufacturer. If I hear anything, I will let you know. Wasn't much help. She just kept telling me she wasn't familiar with Polysorbate 20, since they don't sell it, and that the leather has always been a heavier fragrance oil and nothing has changed in the formulation.