Considering that her power can wipe away anything, I would assume that means
dirt
power
memory (This is big)
damage (somehow she wasn't affected by lightning so I assume she just wiped the damage away)
How can she be beaten. I knew her powers wouldn't be something complicated. Go figure it turned out to be soap. Soap washes away stuff so I guess she can wash away anything to make it simple.
This power is great. She can probably affect logia fruit users too. Damn Oda has such an imagination. I wonder what he was like as a kid in school.
What next, the glue glue fruit which causes people to stick to anything and anyone?
Or how about the mini mini fruit which gives the user to shrink anyone down to doll size for a few minutes.
Now if only Kishimoto will take some pointers from Oda and make Naruto great.