Tack Cloth Questions

Hey guys!
I recently bought a tack cloth made by Gerson. It says
"Cleans any wood, metal or plaster surface of dust, dirt, and sanding residue... ready for a smooth, blemish free finish!"

I was using it on my current model and it left a clear residue. I'm not sure what it is but it is sticky as hell. I needed to wash my hands with dish detergent after giving the model a light swipe.
Following are my Q's:
1. How much pressure should I use when using a tack cloth?
2. Is it normal that there is some 'glue' residue?
3. Is there a recomended temp to keep them at?
4. Is there a expiry date for these cloths? (The packaging says 2004)
5. Is there a special type that I need to buy for modeling paint work? Or are they pretty much the same?
6. Any tips anyone would like to share? :smooch:

Thanks in advance for replies.
Steve

I remember reading somewhere about using a tack cloth on a model. You dont want the kind that has the waxy residue on it, as it will leave a film on the model.

Most general purpose tack cloths are way to waxy for models.
Look for a 'clear coat' tack cloth, i've seen them from 3M. I keep mine in a plain bag so i don't remember the packaging.

I used this type. Works pretty good.
it is only slightly sticky when you touch it, definatley not wet or waxy..
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