Deodorant that Melts Plastic

I used to keep a bottle of Mitchum roll-on deodorant in my drawer at work (in case I forgot to use deodorant in the morning--being stinky at work is grounds for termination!) until recently. A few weeks ago, the bottle started to leak an oily liquid, so I threw it out.

Today, while looking in my drawer, I saw a plastic fork with a melted tip (the part that you hold while you eat). Initially, I didn't think anything of it and just threw it away. But then, the thought dawned on me: "How did this fork melt without a heat source? Was there some secret fire in my drawer that had it out for forks but not napkins?" I had to investigate. I took the fork out of the trash and touched it. The tip was mushy and flexible. Perplexed, I gave it a whiff. It smelled of deodorant! That fresh, clean smell that's so familiar to us all. Then I began to wonder, "If this deodorant is melting plastic, what is it doing to my underarms?!!!!"

I've tried to use "natural" deodorants in the past--without much success--but I think I must try again. I can't use something that melts plastic on my skin, no matter how well it works! That's just insane.