We had an old boy who came in the shop ( thinking about it he was probably the same age as i am now!), who constantly had chain issues....stiff links, creaking noises, covered in crap etc. The chain looked well lubed and he said he lubed it.
On his third visit, after one good oiling and link loosening and then a new chain, we ask what he was oiling them with....oil seemed present.
" FAIRY LIQUID....always used it, seems nice and slippery"
We always feared for his wife, given his appalling lubrication choices!
A cautionary tale that "not all thats slippery is black gold"