I’ve noticed that the Nivea roll-on deodorants I’m using are pretty easy to open after used up, but haven’t found any refill fluid on the market.
I know some people use powders etc, I’m not willing to try that, but does anyone know of a reasonably priced refill?
It honestly was just a random idea from me, I’ve never tried it. However in your case I’d try adding more oil. Perhaps search online to see if there’s a suitable oil.