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Vinegar is an organic acid (acetic acid). Acids are involved in the formation of caries (dental decay) by demineralizing (removing calcium from) the enamel that makes-up the outer layer of the tooth....

WD-40 is named that because the WD means it is a water displacement. Sprayed into a lock for instance that is wet, it will displace the water and lubricate the insides. The 40 stands for the number...

The first thing I would use is WD-40. It will take of sticky tape marks and such almost as well as oops or goof off.