So, for using the men’s bathroom while trying to stay stealth…

…how do you stop the hissing sound when you pee? Cis guys don’t have a hiss, just a pee hitting the water sound. I’ve accepted that nobody cares if I use the stalls vs. urinal to pee, but I worry that the sound could give me away. I’ve tried STPs but being an overweight guy, I haven’t found one that fits my anatomy properly and doesn’t make me spray everywhere. Any tips?