No clue when it slid out near the MidWest weather. I did not Spring Clean this spring and it was retry gunky. I thought about leaving it in window sill limbo.
But I had to know how it had weathered the storm. I dug it out and wiped it down. It looked salvageable. I ran a cotton pad with rubbing alcohol over it.
Clean, smooth, unwarped! Quality tools worth the price. (Your mileage may vary.)
Hope you have joy in your day!