DVD, HD DVD & Blu-ray 2.1-1

Hello everyone, I'm new here and I'm having problems with my DVD player. It was working fine on one movie and then I popped in the next and it started acting a fool. Every time I put a DVD in it, it tries to read the DVD, but can't, and starts making a clicking sound. It goes through the cycle of clicking about 5 times before it gives up and tells me that it can't read the disk. I tried using a DVD lens cleaner, but when I put the cleaning dvd in, the player couldn't play it, so the lens wasn't able to be cleaned. What do you guys think I should do? Do you think I should tried getting it repaired or do you think it's broken? I've had it for 3 or 4 years; it's a simple Sony DVD player.