Try a white vinegar rinse.

When you rinse, rinse with water, then rubbing alcohol to take the last of the water, or rinse with distilled water.

Some people say don't clean things that are really antique and have value.

I don't know how much value they have, and I don't care much, really. I just like how they look when they aren't covered with rat feces and urine. I suspect those people who say not to clean them wouldn't want them in that condition either. ;)

Thanks for the suggestions, lazygardens. I remember you from the cooking forum. :) Once I figure out how to get the film out, I will probably try all of those, and see which works best. I have about 4 bottles of rubbing alcohol.

Two suggestions: If vinegar doesn't help, try a baby bottle brush to gently scrub the insides of the bottles. It will be very soft and won't damage an old bottle. Another idea is to use denture cleaning tablets. Put water in the bottle and break the tablet into pieces that will fit through the neck of the bottle. Let it fizz and sit for a few hours. I've had good luck with both methods.

It's been a while since I have seen a baby bottle brush, but from what I remember the end won't fit into these. They have a very small opening. I have a small bottle brush of some kind, but there are not enough bristles on the end to get the bottom well. it does OK on the top where it curves out from the neck though, since I bent it to that angle.

I will try the denture tablets. I tried the vinegar and alcohol this afternoon, but it doesn't get the film out. Once I get that out, I will try them again for the drying, to avoid water spots.

Hmmm, my brush will fit into an opening of about 1/2". There may be different kinds???

I found a set of really tiny bottle brushes at Walmart or maybe the dollar store.

I was in a wine store today and saw this brush. It is called a brush but it's actually small pieces of firm foam.

Here is a link that might be useful: small glass brush

Try getting baking soda in the bottles then vinegar. I have cleaned many very small old bottles using this solution. Sometimes its takes a couple times to get all the gunk out. Warning the reaction will spout out with some force I use a towel to shield.

poke a long yarn inside until filled while twisting

I would try buying some denture cleaning tablets, break them if too big for the necks, then add water to the top, let sit, shake, and rinse. My husband bought some old druggist apothecary bottles and cleaned themusing this method. They came out so nice we gave them to my sister the pharmacist.