I cleaned my oven with a mixture of baking soda and water. Unfortunately, I got some of this on my kitchen worktop and it caused some stains (see picture). I scrubbed the stains for 1-2 minutes with water, but that didn't seem to have any effect on their visibility.

1. What happened? Did the baking soda react with the wood, or with the surface sealant?
2. What's the best way to remove the stains?

[![Stained wooden worktop](https://i.stack.imgur.com/GUegE.jpg)](https://i.stack.imgur.com/GUegE.jpg)