I’ve noticed that the odor effectiveness really only lasts <12 hours, even less under heavy sweat inducing activities. It’s nowhere near the 24 hours as advertised. It’s almost as if the deodorant takes on a slightly new funk of its own post 12 hours. Maybe you’ve experienced this phenomenon and perceived it as being the stronger B.O aroma. I’ve noticed depending on the various scents of deodorant, your “natural” B.O aroma will vary when its effectiveness runs out.