Lens cleaning advice

[Fred]

Is it posible to have a lens serviced/cleaned from the inside? I have a
lens with some slight crystalization or something on its inner surface.
It doesn't appear to have a noticeable affect on prints. I'd like to
clean it nonetheless, but it would require dismantling the lens. Isthis
even possible?

[Logan]

Don't try this at home! It requires special tools and a considerable
amount of knowledge to disassemble and reassemble a lens. You can easily
ruin it. If it isn't affecting your pictures, then leave it alone. If
you just can't stand to look at it regardless, take it to a qualified
repair shop. It should cost $75.00 - $150.00 for a simple disassembly,
cleaning and reassembly.