Hello and sorry you're having problems.
The issue you're having is due to the laser lens being either contaminated (dirty), or faulty (scratched or mis-aligned).
I would suggest first following the steps below to determine and attempt to cure the issue.
You can try several methods of cleaning the laser lens to see if it helps clear up the problem. The first is to purchase a CD/DVD laser lens cleaner disc, and run it through the system several times.
If your player is not reading any discs at all though, then try purchasing a can of compressed air (available at PC or AV retailers). Open the CD cover, then spray the can approximately 10" from the lens to blow any dust off of it.
If it still doesn't work, you can opt to clean the lens eye itself. To do this you must remove the entire top cover of the case, and then the laser lens is located underneath the rotating platter that the discs rotate on. You will only be able to see the lens by manually rotating the platter and looking for a shiny refelctive "eye" that resides underneath where the disc that is playing will spin. If you run into problems finding it after removing the case- postback with a photo and we can proceed.
Use 80% rubbing alcohol, and a lint-free cloth to gently wipe the "laser lens". Then use a dry spot on the cloth to gently buff the lens clean.
If the CD player is still not reading discs, then the lens or transport mechanism is faulty and would need to be replaced- which is on average a $200 repair, which is not typically cost effective.