I applaud your attempt not to back her into a lie, but you've actually only slightly redirected your question into a statement. More effective yet would be, "Sweetie, you just found out it doesn't work well to blot up a juice spill with your jacket. I need you to get (a sponge, paper towel, etc.) right now and take care of that spill before it dries. And please bring me your jacket right away so I can rinse out the stains. Do you need any help? I want you to tell me when you're done so I can check the results."
That way she has a solution that she knows you will approve of, and won't feel as compelled to avoid your displeasure or try to deflect consequences (because she's just received a logical consequence), which are probably her unskillful reasons for lying in the first place. She may still try to argue or stall, but she probably won't feel the need to lie her way out of the original situation.
Another good strategy is just to say, "Come and show me your teeth are clean," instead of asking if they brushed. If they haven't, they may just bop themselves into the bathroom before coming for inspection.
And make a point of noticing moments of honesty (or other behaviors your appreciate). Kids LOVE being appreciated. Just a quiet mention along with a smile or a hug will give your youngster a reason to do it again, and again. Positive parenting is generally more effective than punishing for misdemeanors.
Honesty is one of the most desired traits we hope to foster in our children. When they choose to lie, it often brings parents anguish. But it will help to know what prompts lying so that we have other means with which to address it. Here's an outstanding article that brings in some of the most recent research on kids and lying: http://nymag.com/news/features/43893/
Taking a toy away for lying is not a logical consequence, and rather over-the-top if you think of how many times a week you probably either tell a white lie or fail to tell the whole truth. If adults had something taken away every time they do that, then we'd all eventually be without our phones, laptops and cars.