"What can i do to stop if affecting me?"
You're already doing that by getting it off your chest here :-)
I have a similar thing with one of my housemates, EVERYTHING about her irritates me: she coughs and sneezes all over the place without putting her hand over her mouth. She is a "heel walker" so evertime she walks past, it goes "Boom, thud, boom, thud..." she's a raving christian, she walks around talking loudly on her mobile as if we all need to hear it, she rips bits out of the bread with her picky-bum fingers - and what's most infuriating of all is that she is one of those "wouldn't say boo to a goose" harmless types - so I can't dig at her without looking like a total wonker!