If I had to give advice about cleaning a telescope lens, any lens I'd use 4 basic rules:

1    Don't touch your telescope lenses...

2    Please don't touch your telescope lenses...

3    Never, never, never, touch your telescope lenses...OR FILTERS....EVER!

4    If you absolutely MUST clean an eyepiece, you should USE EXTREME CARE.

I have seen people clean their eyepieces and filters with everything from their gloves, t-shirts, toilet paper, napkins from local restaurants and even their hats! If you are going to do that you may as well stop by the hardware store and buy a fine grit sandpaper andl get it over with on the first cleaning rather than slowly ruining your lenses. 

Most people don't realize that what we "can't" see can "DESTROY" microscopic surfaces.  If you could see what types of dirt and grime exist at the microscopic level when you use a cloth such as a shirt-tail to clean or wipe the glass of an eyepiece, you would likely never do it again. Even when you use a supposedly "soft and clean" cloth, you are essentially grinding the lens-coatings with rocks and bolders.

Here are some simple procedures adapted from many different websites including but not limited to the Obsession Telescope website video created by Dave Kriege.  By the way, if you want the best telescope that money can buy, click here!

The preferred cleaning method utilizes Dawn dish detergent, and sterile cotton balls and swabs.

• Add 2 drops of Dawn dish detergent (unscented plain original - it's BLUE!) to a quart of distilled water. Mix the two thoroughly.
• Soak a sterile cotton ball or swab with the solution; wipe the glass GENTLY in circular motions.
• Flush with liberal amounts of distilled water.
• Dry by wiping GENTLY with cotton balls or swabs.
• Gently "buff" with Klenex "Softique" non-scented tissue.

NOTE: clean your filters the same way.