My PhD supervisor would wash his teeth over the sink where we'd rinse all the gel preparation tools.
He got throat cancer in his 50s and died soon after my PhD defense.
So, are you suggesting that the gel was the cause of the cancer for the supervisor? If so, was that sink’s drain connected to a diverter such that the waste didn’t enter the typical sewage system?
I don't want to hear any of these stories, considering I am a very clumsy person AND considering that I synthesized polycyclic aromatics. Thank god I got out after a couple of years, but sometimes I wonder what is still floating around in my DNA...