File size gets incresed after running the macro

Hi,
I have a macro which does the below work.
1. Pulls data using web query from website.
2. Copies data from sheet 1 to sheet 2 using autofilter. i.e. I am filtering the sheet 1, selecting only data that has "Reopen" defects. (Filter criteria = Re-open)
3. Create a temp file with the above records and attach the excel file to email.

Here my excel file size got increased to 9 MB after i added the macro for step 2 (see above). Earlier i did not have this code and my excel file worked fine without any increase in size.. Can anybody help me here plssss....

Thanks,
RK