The other day we brewed an all-grain stout, boiled, and started to cool it with the immersion chiller. Got to about 120 F, and a screwdriver rolled unexpectedly and ended up right in the pot.
120 degrees won't kill germs. So we put it back on the burner, heated back to 180, and timed for about ten minutes (by the end of which it was just over 190), then started over cooling as if we just ended the boil.
Total time about 20 minutes till we started cooling again.
Relevant recipe bits:
1oz UK Goldings 60 min
Whirfloc/Nutrients 10 min
1oz UK Goldings 5 min
We RDWHAHB'd afterward and had a good laugh, but still...crap.
We figure it's going to be a bit more bitter than we'd intended due to the 5 minute hops being reheated to 185ish - won't it?
Should we have added more nutrient?
What would you have done differently in this situation (besides not letting a screwdriver fall into cooled wort)?