I don't have access to an oven lol is there any other trick?

 

ask a friend to use their oven.... otherwise might as well smash the lens a buy a new one to replace it....

Or do it the annoying painful way with a heat gun from harbor freight... (just be careful not to get the lens too hot else it will bubble and look ugly)

 

I guess you can try to boil it...I've never tried it...maybe it will work, maybe it will do nothing, and maybe it will break and you will have to buy a new one. Just an Idea. Try it out.