Eyepiece wrench(?)

Hi,

I need some expert advice here please. Is there a special eyepiece wrench available to take out the retaining ring in a eyepiece instead of using a jewelers screw driver? I found a really sweet mint Tasco 7-TE5 in a antique store and wish to clean up the eyepices and 3x barlow. They look like they have never been used but could use a cleaning. The main objective is perfectly clean. Any tips and tricks on cleaning would be appreciated too. Oh, is there a correct orientation on the eyepiece lens after I take it out? In other words could I put it in upside down? I was amazed how sharp this little pup is while viewing the moon tonight.

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Is there dirt inside the lens? Usually it is external and does not require removing the lenses.

I believe it was Rick Margolies who led me to a site that had a plethora of spanner wrenches. Perhaps he can also make some recommendations as to types.

On another note,

Any suggestions on cleaning the outside, without taking it apart? How do you clean the smaller ones like a 4mm, 6mm etc.?

Thanks in advance,
-JW:

Here's a picture of one of the eyepieces I am talking about.

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