Cleaning the PS2

[skykid]

I got a question about a PS2 laser cleaner i have...is it safe?

May sound dumb because it is especially for PSX/PS2 as it has PSX boot data, and surely they have gone through testing and stuff.

But i have 2 PS2's a V3 and A V10 i do the V3 manually and when i tried the Cleaning disc in the V3 it made horible clicking noises (which is presumably when the brush hits the laser) but isn't this causing more strain on the laser with it getting twocked by the brush?

By the way its a Blaze Laser Cleaner.