How to Know When It's Time to Change Your Underarm Deodorant. Nothing lasts forever, including your deodorant. A number of factors determine when it's time to evaluate the deodorant you are currently using. Read on for a few simple steps to help you know when it's time to change your underarm deodorant.
Look at the date of your deodorant. If that "use by" date has already passed, it is time to change your underarm deodorant.
Some deodorants do not come with a "use by" date. If that is the case, check to see if there is either a "manufactured" date or a "copyright" date. If either is more than a year in the past, it is time to change your underarm deodorant.
Open your deodorant and use several tests to determine its current condition. First, look at its physical appearance. If it is a solid roll-on, is it beginning to discolor or crumble? If it's a gel, is it starting to whiten or dry out? If it's a spray-on, is the spray function working properly? If you see any of these problems, it's time to discard your deodorant and start fresh.
Sniff your deodorant. Does it smell like it did when you first purchased it? Is the smell as advertised? If not, your deodorant may have become contaminated by bacteria and it is now time to change.
Evaluate if your skin is currently as healthy as it was when you first began using your current deodorant. Does your deodorant no longer reduce or eliminate odor? It's time to change.
Have you recently experienced infections or irritations under your arms? If so, it is time to change underarm deodorants.