How do I - Cleaning the Corrector Lens

I umpired 12 innings today and was tired when I got home. I set the
telescope up anyway because I wanted to see the crescent Venus before
it went away on me. It was low on the horizon and looked like it was
on fire with the roiling atmosphere. A quick tour of Saturn, Jupiter,
and the Terminator on the Moon followed. I noticed some lens flare
and, having taking pictures long enough, I immediately thought, "Dirty
Optics".

When I broke the telescope down I checked everything. All clean
except the corrector plate (Celestron C 91/4 SCT). It
was...well....filthy.

I've heard both pro and con to using compressed air. I've been using
a phtographic lens blower (squeeze type) but I've moved beyond that.

So, if I could get a quick opinion on:

1. Compressed Air (pro, con, do you use it).

2. Next step if Compressed Air won't do it.

I don't want drastic measures yet. This is just dust and should come
off without a great deal of trouble..

Clear, Dark Skies

Mark