CD player cleaning.

Is there any maintenance required for a CD player? I have an Acurus player that refused to play any CD's the other day and then when it did it would just skip from track to track. It's working fine again and I was thinking dirt on the lens. Should I be cleaning the lens regularly? Thanks for any info.
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What about lens cleaning? Will a dirty lens cause skipping? If you have a CDP that skips on any disc played, will a CD lens cleaner remedy the problem? And, if this doesn't cure the problem, is there an alignment process? (Like the alignment of a phono cartridge?)
i just read an article in the back of last months stereophile mag on laser allignment! it said what it was all about and what u need but didnt say how to go about it step by step..
so i wrote to the guy that wrote the article and he's getting back with me in a week or two after his time off and i could foward you whatever he sends me on laser allignment.