Click the button below to copy an empty character to your clipboard.
If this doesn't work on your device, use method 2.
If the first method does not work for you, try this method. You can test if it works below.
Select and copy the content of the blue-bordered textarea below.
You can use the Select button under the textarea, and then copy the selected text manually.
Paste the empty character in the textarea below to test it. If it works, then the grey text should disappear.
Invisible Words Tool