till the dust is smaller than 1mm in diameter leave it, as it's not going to do anything with Your pictures, If You really need to clean the lens, here's how I do it:
- check if there are some visible pieces of dust, that can be taken by air blower
- if so, use the air blower
- breathe gently on the lens
- take a clean part of tshirt
- clean the lens with this clean part of tshirt
I've never had any problems with any of my lenses, and I'm using this technique for the last 10 years.

When I'm at home, I sometimes use the IPA cleaner and some cleaning tissues.

Check the instructions on the bottle, but it should be a sure thing for the glass jmichael99. Microfiber is good just make sure you wash it when it gets used up a lot. Don't ever use it to clean the sensor though.

when i went to the beach i got a little ocean spray on my 70-300mm lens. I know its salt, but it was VERY little. just a few specs. I have some monster cleaning agent and microfiber towel i use on my LCD TV. would this be ok to use on my lens?

Thanks