When a tenant asks for unnecessary repairs

[Alexandra Joy]

I posted about this same tenant before. She is a bit demanding but I took advice and have been trying to be extra kind and helpful. She is also my neighbor so I have been bringing her organic produce from my vegetable garden (she loves that) and even helped dog sit her dogs for free.

She is still being nitpicky about things and I am hoping for advice on how I can tell her no about unnecessary repairs. The latest example is she wanted me to go over to kill a bug. Not an infestation, just a stray bug that wandered in.  I did.  She wanted the shower head descaled.  I soaked it in vinegar for awhile.  This morning she said the kitchen faucet is leaking at the base.  I went over to check it and there is just a tiny bit of moisture at the base. It's not spraying or broken.  

How do I decline replacing it and keep a good relationship?  If it breaks I certainly will, but it's still working just fine and I would rather put off what will be a couple hundred dollars repair until it's really necessary.