I'll have to check to see if I have any more... . But the RV repairs shops have a lube aerosol that comes out brown and foamy. It has teflon in it and I sprayed it once about 6 months ago. No noises since. I had previously tried wd-40, engine oil, slick 50 one-lube, and others. You may also check into a product called... . Energy Release. I used it a long time ago on some aluminum-carbon linkage. Works awesome.