Maintain starter through cold weather
I'm looking for advice on maintaining my starter now the cold weather is here in Canada. During the summer my starter is quite active and I can leave it in the fridge for the week and take it out for use on weekends...I feed it 5 (starter) 15 (water) and 20 (flour).
Now it's colder in the house and it's struggling to double - I've been leaving it longer on the counter (12+ hours) but it doesn't look happy. After doing some reading I wonder if I'm starving it? I'm trying 10:20:20 to see if the higher hydration will encourgage a little more activity. Do I need to find a warm place for it? Is 67~69 F too cold?