Keyboard cover necessary?

[yourdream]

So I have one and have been using it for a while now. It gets really dirty quick (It has attracted tons of dust and dog hair). And I hate to keep washing it, so I took it off. Should I continue to use it after washing it or just leave it? The keyboard cover leaves alot of marks onto the screen, which makes me constantly keep cleaning the Aluminum MacBook's screen. Is the keyboard cover really necessary? I don't want dust and dog hair going into my keyboard keys.

 

[Harmless Abuse]

I use a Moshi clearguard because I have a husky, and the pet hair is astounding.

I don't notice any marks on my screen at all, and I only have to clean it once every 2 - 3 weeks with a little handsoap, let it dry outside, and I'm done.

Silicon(right one?)-based keyboard covers aren't very good for me, they seem to hold more of everything and are a lot thicker.

 

[yourdream]

I use a Moshi clearguard because I have a husky, and the pet hair is astounding.

I don't notice any marks on my screen at all, and I only have to clean it once every 2 - 3 weeks with a little handsoap, let it dry outside, and I'm done.

Silicon(right one?)-based keyboard covers aren't very good for me, they seem to hold more of everything and are a lot thicker.

Yes, my is made of silicon.