For the past several years, I have cooked rice and pasta in my microwave instead of on the stove. This involves putting the rice or pasta in a bowl of water and then using the automatic rice or pasta program in the microwave.
When I do this, the microwave exhausts some of the water vapour from the bowl out onto the surface that the microwave is sitting on, leaving behind damp patches.
Unfortunately, I haven't been cleaning up this wet residue after each use. As a result, the surface that the microwave was sitting on has developed a white stain. The microwave has lived on both a piece of wooden furniture and also a laminate benchtop, and both have developed these white stains.
Stain on laminate benchtop
This one is faint, but if you look closely near the bottom section, you can see lots of little pale white patches.
Stain on wooden furniture
What I've tried
I've tried the following to remove the stain, and none of these worked:
- Wiping over with a wet cloth
- Wiping over with soap
- Wiping over with dish-washing detergent
- Wiping over with vinegar
- Scraping off with a scourer
- Soaking in dish-washing detergent
I haven't tried bleach since I read that it can take the colour out of the furniture and benchtop.
What is this white stain? Is it some sort of mould? Or could it be starch from the rice? Or something else?
How can I remove the stain?