I have a user with a 40 MG spreadsheet with lots of calculations. At the end
of the year, I clean out the data for her and she starts with a clean slate.
She is complaining that even though there is no data to calculate anymore, it
is taking 5 minutes to calculate when she is saving.

She and I remember this problem last year and somebody (who is no longer
here) did something to "compress" the data. Any idea what that could have
been?

Thank you