I have an array of strings I'm writing to excel, one is a time string that looks like this 12:24:13.321 that I'm sending to 'write string to spreadsheet' along with string of other numbers. When I open the the excel file, the time looks like 24:13.3 but if you click on the cell, excel still knows the hour, but seems to lose the milliseconds. all the other numbers are fine. How can I format this so it keeps the hour and milliseconds?