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Ok! I'll try. :)

Vaseline doesn’t clog pores. So it won’t cause pimples.

You need to wash your pillowcase more often than just when it gets greasy and dirty. And you need to wash your face every with a real face wash. You also sound like a teenager, which means your face is naturally producing a helluva lot more oil so you need to practice even better hygiene.

I change my sheets once a week but change my pillowcases every other day. Did it touch my face? In the wash it goes.

Cotton pillowcases grow and collect bacteria easier and faster than polyester ones do. So if you are using cotton pillowcases and haven’t washed them recently, that’s probably why you’re getting acne. If you switch to polyester or silk or synthetic fabrics, you’ll see your acne clear up quickly

See this article