OodMeister

So recently, I stumbled on a 70s era Discwasher, with some D4 fluid from before the RCA rebranding. Some collectors I respected told me that the fluid is still safe to use on records. I saw no immediate problem upon using the fluid, but now there are a bunch of people telling me that it wasn't safe, and that surpassing the shelf life of 2 or 3 years is possibly damaging to your records. Now I'm worried that I've done some sort of damage that I just don't notice yet. Any help?