Today, I pulled out my Klasse SG and when I opened it, I smelled a really bad odor coming out of the bottle. The smell was a mix of rotten eggs and bad milk. I bought this about a year and a half ago and have only used it once, in the very beginning. My question is, does Klasse products go bad and since I'm adressing this question, does car care products (polishes, waxes, etc) turn bad over time?
Thanks.
Thanks.