Sometimes, your data contains some characters which make some portion of your data unusable. Below is a macro which cleans your worksheet in the following way -

  1. It will remove non-printable characters with ASCII codes 0 to 31.
  2. It will remove leading and trailing blanks.
  3. Will remove characters with ASCII codes 127, 129, 141, 143, 144, 157, 160.

A good introduction to above character codes is at https://www.thoughtco.com/remove-non-printable-characters-3123798

The workbook containing the macro can be downloaded from Clean up Data Macro

1. Make a backup of your workbook.
2. Open your workbook and ALT+F11
3. Locate your Workbook name in Project Explorer Window
4. Right click on your workbook name > Insert > Module
5. Copy paste the Macro code given
6. Go back to your Workbook and ALT+F8 to display Macro Window
7. Run your Macro from here
8. Delete you Macro if the Macro was needed to be run only once.
9. Otherwise save your file as .xlsm if you intend to reuse Macro again.