This was my favorite handmade Coffee Beans mug in September. You can see where it was showing a bit of patina around the top and bottom of the exposed ceramic areas, which I wasn't totally in love with, so I rubbed a tiny bit of mineral oil across the engraved areas with my fingertips. This darkened up the red clay all over, and it still looks nice and even 4 months later, after near-daily running through a dishwasher!
If your Farmhouse mug is looking a little dry in the middle too, I recommend trying this out at home. Wash normally afterward with dish soap or in a machine, and it should continue to look brand new for a good long time.
Have a question about caring for your sandcarved cups? Ask me anything!