Glass and Mirrors - Cutting mirrors?

I've cut some small pieces of glass but want to cut down two mirrrors.
One is a 1/4 inch thick standard glass mirror and the other is a broken sliding closet mirror door that may be tempered and has a thin coating on the back.
Ideas?

1/4" mirror, cut it on the smooth glass side and tap the line until it runs. BECAREFUL!!! Many times when cuttting old glass it will break. Be sure the surface is totally clean.
As for closet doors, not usually tempered, however, there should be a safety backing taped over the entire back surface. I totally recommend throwing the closet door away and buy new mirror in this case.

Donna:

Thanks for the help.

The mirror door I want to cut was mistakenly used with the two panels mounted back to back as a pocket door when we purchased our house.
I would like to try to cut it down and mount it on one side of the pocket door that replaced this mirror.

I tried cutting the first mirror and the line took off on me. I had it laying on the floor and wasn't in a good position to run a steady continuous line with the cutter.
I've since searched the subject and came across conflicting advice.
One site said to make sure the glass was clean and dry, another said to use cutting oil?

BTW: I am in a rural area and the local glass shop owner started whining about being responsible for breaking someone else's glass.
If I break this one it's no big deal. I'll just have to wait 'till my next trip to the big city.
I'll remember him next time he asks me to fix his a/c. :D

For the next time you cut glass.
Be sure glass is clean AND dip your cutter in kerosene or a light grade oil.

One of the cuts I'll make is about 6 feet long.
Would it be an advantage to put drops of light oil along the intended path of the cutter, or is a single dipping of the cutter enough?

I'd dip the cutter once and take the cut in one swoop. Do not stop and do not rescore the line when you're done.

Thanks again.

I likely won't be doing it for a couple of weeks, which will give me a chance to buy a good cutter.

I'll let you know how I make out.