Hello dear friend,
ludomali is right: you are not using the best method around.
Yes, the mix you are using appears to be effective, but it lasts for a very short time, and let's not forget about the fact that it involves the use of alcohol near insects: not the best idea if you are trying to keep them alive.
We advise you to use a MIX of vaseline OIL and vaseline PASTE. The slippery property is given by the oil; the paste gives the adhesive property that makes the mix stay in place around the edges of your container.
Try to experiment with it before applying it, because if applied by inexperienced hands, it leaks... and vaseline oil leakage kills ants. If they come in contact with vaseline or engine oil, it creates a patina that obstructs their respiratory opercula and leads to suffocation. So you have to create a mix that stays in place and does not leak. During the summer heat you may find easier to use vaseline paste without adding oil, because it would already be slippery enough.
You can use vaseline oil or engine oil.The type of engine oil we are talking about here is sewing machine oil. It would have been so fun if it had been another kind of engine oil... rocket engine oil maybe?
Anyway, SINGER manifactures a good sewing machine oil, but every other type of sewing machine oil is equally recommended.
also i own tarantulas, L.parahybana,G.pulchripes and B.klaasi, ofcourse i have ants, they're in 3 separate test tubes, i have 2 queens of C.vagus and 1 queen M.structor. I've been keeping ants for around 3 years but very unsuccsessfully. My queens died and i've had problems with containing them in the basin area without them escaping,but i've recently found out about a mix that could keep them from escaping, baby powder+alcohol (70%) is this a good method? 
