fuss (around) with (something)
To continually fiddle with something, often nervously and unnecessarily. Stop fussing with your hair, honey—it looks great. After I'm done a painting, I don't like to fuss around with it.
fuss (around) with someone or something
to keep bothering with someone or something; to fiddle with someone or something. Don't fuss around with it. We'll have to get a new one. Don't fuss with your children. They will get along just fine without all that attention.
To handle or manipulate something excessively and unnecessarily, especially when overly concerned or nervous: The contestants fussed with their outfits before the pageant began.