Cleaning laser lens; good idea?


I'm assuming that over time, dust and grit will slowly accumulate on the laser lens of CD (and DVD) players, given that the laser faces upwards, and dust will cling to CD's.
How and when does this become a problem, and is there an easy and safe way to remove this build-up?
carl109
Post removed 
Horse hair is used for camera lenses. make sure the bristles are not touched.
Check out the reviews on amazon about Allsop CD lens cleaner - It has great reviews, cheap and you can use it for CD player in your cars too.
I just ordered one, not arrive yet
Questions,

Has anyone used the Allsop cd cleaner, model 23321 ultra Pro Carbon-Edge dvd and cd drive cleaner?

Will these type of cd cleaners harm the player?
Hair for brush should come from male Harbin-Kolinsky tail harvested in winter.