There are some cases where users accidentally turn on the “sticky field” icon, perhaps with a stray mouse click, and then are mystified and frustrated that the text in the field persists. Two recent examples are shown in the links at the bottom of this post.
Perhaps there is a simple solution.
If you intentionally stickify a field, that means you want to either keep its existing text or at most only edit it a bit. So if instead you completely erase the field and reset it to blank, that means the stickiness was a hindrance rather than a help to you. It caused you to take extra effort to achieve a result (a completely blank field) that you could have gotten for free by default. So if a user completely clears a sticky field, that strongly indicates that they probably did not want the stickiness in the first place.
So I suggest that if a sticky field is completely erased by the user, that should automatically unstickify it.
This will rescue the naive accidental sticky-icon clickers, and should not inconvenience users who intentionally use sticky fields, because this new behavior will be consistent with their intent. Indeed, they will now be able to unstickify a field without a mouse click, using only the keyboard (using Tab and Shift-Tab to move between fields).
Examples of hapless “stuck” users: