Towel Clip

I made this thing!
a pretty useless, well uniquely useful :-) spring clip to hold a tea towel in place - clamped between the underside of the worktop and top of our washing machine. (The second pic shows it stuffed into an appropriate gap in my.. office/workshop/playroom)
conceived, designed, prototyped, determined to be too small and not springy enough, design tweaked (laughably simple inventor part file attached) reprinted. about 3 hours start to finish.
I'm unreasonably satisfied with t