Starter isn't tripling any more; is this a problem?
I have a starter born this past May that, all summer long, reliably tripled at its peak. Around mid-August - BEFORE the weather got appreciably cooler - it started to peak at lower and lower levels, until now I'm lucky if I can get it to double before collapsing. It seems to be raising my bread just about as well as it did in the summer, but I'm worried about the downward trend. My living quarters are supposedly temperature-controlled at about 72 degrees F, though I'm sure it's not as stable as my thermostat claims it is.
Any ideas why this could be happening and if, or when, I should worry about it?