Aerotow becomes a different beast when the tug is not climbing. I landed at another airport and had the tug come for a retrieve. Once it levelled out, serious bows developed and, not thinking of the air brakes, released shortly before the tug pilot was about to do the same.
A sideslip can also help.
After a few hundred tows you will wonder why you had so much trouble
Hint: Just sit there and do as little as possible.
The Condor simulator is much harder to fly on tow than a glider. It can sharpen up your perceptions and reflexes.