What Causes The Growth Of White Film On The Glans Penis?

I have a white film growing on my glans penis, it is painless, itch-less, and can be easily take off by just gently robing it. I have tried washing it thoroughly, but it keeps returning; and after the white firm been washed out, my glans looks extremely sleek when it is erected. Also after i masturbated, the white film seems growing faster.

I have no other any obvious symptoms, like painful urination, aching testicles, etc. and there is no other abnormal symptoms on my genitals either.
I don't have circumcision and my foreskin is normal length.
I'm worried I may have an sexually transmitted disease or candidiasis., may I answer your health queries right now ? Please type your query here...