Try this
- Offer the appreciation in a setting where they can receive it without an audience or time pressure.
- Avoid follow-up questions such as whether it was good enough. If a practical confirmation is needed, ask only for that.
A worked example
“I left a note by your book. You don’t need to read it aloud or tell me what you think right now.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Do not use a quiet reaction to conclude that the gesture failed. If you need feedback about future preferences, ask later and make the question specific.