[Slow-V6]

I did a update on Thursday for the newer update that came out in September on the PS3. After I did this it started out that I couldnt play Uncharted 2 ( as stated yesterday). I am trying to sell the PS3 because we got a BR player from my Dad for Christmas but today the PS3 wont play any BR Movies at all. It does play regular DVD's but I cant play any PS3 games or BR movies. I called up Sony ( again) and they told me that the Update wouldnt cause the disc read errors and that it is more likely a dirty Laser head on the dvd drive. They said since I dont play it that much that it is a common cause or this. They want me to send it in for service.I found instructions on opening up the PS3 and cleaning the lens or laser head but I am a little uneasy about doing so. Has anyone had this happen to them? If so is it a simple process to clean or not? I did the fan cleaning already on it and that didnt help out at all. The error code is 80010514.