Your best bet on a stuck sparge is to add hotter water, stir it up and clear it again. If you have rice hulls handy, add some of them.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk