Grumpy Old Geeks People Kate Petrova Person Kate Petrova 2 mentions in 1 episode The researcher credited by the hosts with graphing reviews of scented and unscented candles. Mentions 487: Fieri+ Dec 9, 2020 1:02:32 Internet sleuth Kate Petrova. And she has graphs. 1:02:48 She's done unscented candles versus scented candles as a comparison.