That's my problem switcher. My sensory perception isn't sensative enough. At least on the Boges, I couldn't tell it was too low until I got the burnt taste. By then it was too late. It still worked for a while, but was never the same after that. And I don't want to burn these cartos. So I like to see it so I can keep at least the bottom 1/3 soaked. I love it! Haven't burned one yet! (well... except for the mishap with the paperclip)
To clarify something... Isaac, you asked me if they were the black whistle tips, and I just saw black and said that they were just the clears. Here's the correct answer: No, they were the one with the regular white,flat .... tip on them.