Residue, mold, and bacteria can build up inside hidden parts
Because customers never see the inside of these machines, they often assume everything is spotless — but that’s not always the case.
2. Old Coffee Is Sometimes Reheated
During slow hours, coffee may sit in warming containers for long periods. Some customers and insiders claim that:
Coffee isn’t always freshly brewed
Old batches may be reheated instead of replaced
Taste and quality suffer — and so can safety
While policies may say otherwise, real-world practices don’t always match the rulebook.
3. Milk and Creamer Issues
McDonald’s coffee drinks often rely on milk, cream, or flavored syrups. Problems can arise when:
Milk containers aren’t stored at the correct temperature
Expired dairy products aren’t discarded immediately
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