My cell phone lens that looks dirty; or, I'm not even sure it qualifies as a lens — it's the transparent cover. See the photo below.
I'm not sure if the lens was always like this or it happened at some point after I got it. It looks dirty and impossible to clean. I tried using lens cleaner (alcohol?) and some paper I bought for cleaning the lens of my DSLR, as well as just rubbing it out with my t-shirt (hey! it's just a cell phone camera):
Any ideas what to do about it?