So I have a laptop which I bought around 9 months ago. Sometimes I could see dust accumulating on the screen surface and I'd have to clean it out periodically. My friend told me that I should buy one of those acetate-like screen sheets to protect my display. Should I do it? My first instinct is not to get one since the screen is only vulnerable once the laptop is open. It's very well-protected whenever I put it in my bag.