Happens to me all the time. A few years ago I borrowed my husband's black timer to use. I know I used it but can't remember where and it's never turned up since. Three replacements have been bought and used, but the original never reappeared. And a couple weeks ago I was pulling block of the month kits out of their storage place to sell on eBay and found a $100 kit, purchased at a quilt show, that I had absolutely no recollection of buying ...