How long does it usually take to start slacking off? At just shy of 7 weeks old it has been 1 week on FF. I am using a gallon glass jar filled have way up. I am taking out about 1 1/2 cups daily and adding that back daily with about half a cup of water. Can you over ferment the feed? if not then I will go with a 2 gallon bucket.I'd get away from jars and little quantities so you don't have to refresh so often. It sounds like it's not fermented or barely so and the deeper the ferment, the better for the bird.
I'd get a 2 gal. bucket and start a mix in that. The temps you are fermenting in are sufficient for a good ferment if you just give it time to build a strong colony of LABs. You don't have to warm the water or the mix to get a good ferment...mostly it just takes time, but if you keep adding fresh feed and water every day you aren't giving it a chance. Wait until you've almost emptied your bucket before refreshing with water and new feed, stir it well and the old will inoculate the new. The laundry room is fine for the FF....mine is outside next to the coop and I'm having cooler weather than you..and it's been out there for months now.
Also, there comes a time in their consumption of the FF where they will slack off and start eating less. Everyone pretty much figures this is the point where their nutrient starved bodies are finally getting leveled off on all the vitamins and minerals they've been missing all along~which are now being satiated by the FF~ and so now it's just about calories. That's a good thing! If they stay in good condition on half the feed they had been eating, you are golden and finally realizing the benefits of the FF.