They already have added all the shifts they can while still maintaining covid precautions. The trouble is, it's very risky and expensive to expand facilities to cope with a period of dramatic surge in demand when a year from now that could completely dry up. Federel for instance does not have any space to expand into and local restrictions make that additionally difficult because people are afraid of explosions in the city etc... not to mention to expand production they need to expand water supply and treatment and those facilities are expensive, complicated, and slow to implement.
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