No, you can do it yourself. There are cleaning discs that I'm not particularly fond of because the brush against the lens as they spin, but many folks like. If the problem is just a piece of dust on the lens, a squirt of clean compressed air such as in the cans sold for cleaning camera lenses will often do the trick. There's also a type of cleaning disc that makes no contact at all with the lens but has holes that set up air currents as the disc spins -- which may also dislodge dust stuck on the lens.
If the lens is filmed from smoke or oil particulates however, then the right way to clean it involves removing the lid, then unclipping the plate covering the top of the optical drive. Then use a Q-tip barely moistened with rubbing alcohol, and gently swab the lens.
Again, lens cleaning is called for if you are having reading problems with multiple discs that all appear to be clean and unscratched on their playing surfaces.. Problems reading just one disc are more likely due to a flaw in the disc, some of which may not be visible to the naked eye (particularly for Blu-ray discs). Discs with grundge on the playing surface should be cleaned.