How do I get spots that are inside my camera lens out?

Should I get a camera lens or a computer?

• I want either a camera lens (Nikon 18-200mm f/3.5-5.6 G ED-IF AF-S VR DX Zoom Nikkor Lens) or a Macbook Air ($999 11 inch model). They both cost about the same. I'm an amateur photographer. I already have the 18-55mm kit lens that came with my camera. I would love the other lens so I can zoom farther, but I'm not sure if I'm really going to use that feature that often. I never really need to zoom further than 55, but at the same time, I never know when I'm going to have to zoom. Currently I have a Dell Inspiron 1750. I've had it for over two years. It's gotten the blue screen three times, but not recently. It usually freezes up, and it makes this clicking sound (what I assume is the hard drive). I sometimes bring it to school, and a 17 inch computer is a pain in the butt to carry around. If I get the Macbook Air, I would obviously get an external hard drive since 64 GBs is not enough to me. I would use it for school and internet browsing. I would use my current computer for gaming and editing my photography. What do you guys think?

• Answer:

  Well it sounds like you need a new computer rather than camera, and the MacBook Air's are great! But you said you take it to school, doesn't that mean you're a student and get education discount too!? :)