Older double hung windows are difficult to open AND close.
SPIRAL: 22" × 5/8" balances. Blue Dot.
Tom from SWISCO responded:
May 30, 2018
Sounds like your balances have jammed up. Try the S600-22, if you have a tilt window and a 5/8" x 22" tube. The blue tip will be available on our site when you go to order.