Is there a way to stop the check performance pop-up?

I have a spreadsheet that I use daily that just started getting the stupid "Slow workbook? 50% of your workbook has unused formatting and metadata that can be optimized to improve performance...Check Performance" pop-up that I'm having to close out every time I open the workbook. It's super annyoying because the spreadsheet is formatted just the way I need it and the stuff "excel" wants to remove is stuff that I don't want removed. How can I make the popup stop? I've looked through the options and googled but can't seem to find a straight forward answer. Hoping someone has some kind of trick to make it stop.

The main issue seems to be that I have every other column formatted like pictured below. I did this so that I could easily see each column of data to make sure I was working in the correct one. Is there a easier way to do that?