Take a cleanex or other soft tissue and put lighter gasoline (perhaps Zippo-Gas) on it.
Then rub smooth over the blade. I got best results in cleaning different skins from tape debris. Another possibility may be a soft eraser. I didn´t try this.
Hope, it helps you!
Just had this same situation, the gits that just sent me a parcel used that ruberised glue, the type that never dries but sticks to everything, the blade was covered in it.
After trying to get it off for ages with water and a scrubbing pad, to no avail, desided to give the blade some protection with my Tuf-Cloth. The glue came off straight away.
Lighter fluid works great. If you don't have any handy use WD-40, but not on the moving parts. Why? Cause after a while the WD-40 will gunk up and not want to come off causing the blade to not want to move, then you will have to use a different cleaner to get the WD-40 off. Anyhow back to the subject. I just keep a peace if cotton cloth with WD-40 sprayed on it in a bag. If there are fingerprints or tape on the blade with a little bit of rubbing it comes right off. In addition it protects the blade from water and other liquids. Kind of like an oil cloth in medieval times...
P. S. Just in case you didn’t know WD-40 means Water Displacer No. 40
I've used "Goo Be Gone" with good results and no damage to the blade or handle. It is also helpful when removing those dang price stickers from something you buy.
