My Heico Perma Wash Does Not Smell...Is This OK?

Have used and liked Perma Wash forever - but my last bottle of concentrate from my old stock has practically no smell at all...while a fresh bottle will usually have a bit of "fixer-ish" smell.

Should I trust this? Anybody care to go smell their Perma Wash concentrate and chime in? Thanks!

Since probably around 1980?, my stock bottles of HEICO PermaWash always had a faint sweet "plastic" smell to them. Never even after use did the liquid have anything close to a "fixer-ish" smell to it.