To overdo it
Careful not to overdo it! To "overdo" something is to do too much of something, or do it too intensely.
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When it comes to fragrances, hotels have to be careful not to overdo it. To “overdo” something is to do too much of something, or to do it too intensely. If you overdo it with scents, you can bother some people, especially if they’re trying to enjoy a meal. “Careful not to overdo it!” is a common warning.