I have a similar problem because of "living" in multi cities. I try to attach the mask next to something I won't leave the house without. Car keys, id, wallet, condoms.Since I moved the other day from SD to Las Terrenas I have had a harder time with the mask. I didn’t forget it in the capital and it seemed more natural with lots of people. In Las Terrenas I have twice totally forgotten. I am getting used to it now though.