Can you smell the age of brake fluid or determine the condition of the brake fluid by looking? I believe the fluid was replaced one year ago; I found a receipt on the new "used" bike that stated as such, but the shop is out of business so I can't verify it. The fluid looks and smells good currently, but I'm not expecting it too smell like heated fluid does over time either. Anyway, I know that I could change the fluid to be sure, but I was curious. Thanks