Agreed, and by no means am I insulting anyone in this thread when I say this next line.
Yeah, I guess it makes more sense, not knowing the common sense of others.
To tell them, 'yes, go ahead and open it'. Specially when a person would even have to ask what fluid to use for cleaning.
Considering alcohol (iso.) is what is used for ANY wet cleaning solution for CD, Lasers, VHS heads, Tape deck heads, etc...
Although, if you do get that far and are not comfortable with putting a 'fluid' solution on your laser.
Then I would suggest to go, to the photo store and pick up a blower brush (used for cleaning camera lenses).
You can get them real cheap (like 4.00 or less).
And really, that is all that is needed for most cases, as the laser rarely has anything other than dust on it.
For those wondering about the blower/brush, I will find a link..
something like this, although I have seen them for a buck or 2 (heck if needed, I could probably give one away, I'm sure I have a half dozen here, just PM me)
http://www.accstation.com/bothxxxxck01.html