Just to elaborate on Allans answer in post #3. For things that are noncritical where a failure will result in nothing more than an "Aww crap, it broke again" or digging a part out of the dirt, the trick for drying electrodes works.
However for code work that falls under AWS D1.1
AWS D1.1 Clause 5. Fabrication
126.96.36.199 Low-Hydrogen Electrode Storage Conditions.
All electrodes having low-hydrogen coverings conforming to AWS A5.1 and AWS A5.5 shall be purchased in hermetically sealed containers or shall be baked by the user in conformance with 188.8.131.52 prior to use. Immediately after opening the hermetically sealed container, electrodes shall be stored in ovens held at a temperature of at least 250 F (120 C). Electrodes shall be re-baked no more than once. Electrodes that have been wet shall not be used.
From table 5.1 Allowable Atmospheric Exposure of Low-Hydrogen Electrodes.
E70XX & E70XX-X 4 hours max.
E80XX 2 hours max.
Note 3 for table 5.1 states "Electrodes shall be issued and held in quivers, or other small open containers."