Thanks for the post.
Dish soap, which is usually a bit better at cutting grease, is also useful. I use Simple Green, as it's non petroleum based, so doesn't attack the rubber sealing surfaces.
Most motorcycle shops carry the filter oil, which has a slightly tacky quality when dry, and it's also available in aerosol form.
And remember to not over oil the filter or the excess will end up on the airflow sensor perhaps throwing a code, and/or baked onto the intake valves. Just enough to allow it to wick into the cotton gauze filter and give a nice even color (which is why they use colored oil).
