What does pessimistic mean

tending to see the worst aspect of things or believe that the worst will happen.

Pessimism isn't just about negative thinking. Personality science has revealed it also includes a focus on outcomes – that is what you expect will happen in the future. While optimists expect positive outcomes will happen more often than not, pessimists expect negative outcomes are more likely.

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explanation:

the best practice

1. keep your workspace clean

2. wash your hands

3. seperate and clean chemicals and equipment

4.   use microfiber cleaning utensils

5. clean and sanitize all work surfaces

hope this !