Tom from SWISCO responded:
October 11, 2016
Thank you for posting. We believe you may need product 90-237 keeper. Compare that to what you currently have and let us know if that is a good match for you.
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Dave Sr. from SWISCO responded:
October 17, 2016
I believe the problem could be with the top sash. Yours could be be a little lower than it should be. One reason why this happens is because the sashes are too tight, so with age the top sash is sagging a little. My first thought is to raise the keeper, but you might not be able to. Could you possible file down the height of the catch "spoon" on the lock?
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