Ultimos are sensitive (Gosh, I talk about them like they're my kids...LOL) They don't do well with "dripping" or overfills. Leave the foil on as long as possible...IF you drip, unscrew the battery when you're done...Many batteries don't have a block against leaking liquid.
Jane used it for the first time this morning! I am loving it! Thank you so much for the info. I will leave the dripping for my 510.