Double Click on “Format Painter” Option is not working in my Excel
Set the mouse double click speed a bit slower. You can do it from Control Panel >> Mouse >> Mouse Properties.
Please try this out and see if the Double click issue on the Format Painter button gets resolved.
Else, you may try the following alternative:
Select the text whose formatting has to be copied and then press Ctrl+Shift+C. Thereafter, use Ctrl+Shift+V to paste the formatting (repeat as per requirement).