Hey Guys,
Next time use a hair dryer. Put it about 1 inch away from the sticker for about 45 seconds this will heat up the adhesive and the sticker will peel right off. This will literally take less than 5 minutes including snagging your wifes hair dryer. I highly recomend not using paint thinner, etc. because of the effects these products have on the plastic. The hair dryer won't get hot enough to damage the plastic since polycarb's injection temp is much higher than the output of the hair dryer, but the chemicals can cause damage over time and your blades could possibly fail, some of the chemicals even after being wiped off can remain and they can rob the plastic of it's flexibility, etc. Remember these blades are swinging at 1600-2000 RPM we don't need anything other than our own clumsiness to make them any more dangerous.
Hope this helps,
Larry