I haven't used wd-40 on this bike. That's mainly the reason for it being so long since I've lubed it. Waiting until I found the right stuff to use. It wasn't that sandy, but I did notice substantially more dirt on my body when I got home than normal. That's what us leading me to believe that it's just really dirty and just needs to be cleaned. It's not making any most our doing anything to make me believe that something is broken.