Starter is not rising 🥲

Looking for suggestions/help/ guidance please ! This my starter ( day 8or 9) that I made from the dehydrated starter . It was rising great around day 5 and 6 . Then, I discarded all of it except 1/2 cup and fed it 1:1:1 on day 7 . It didn’t rise at all since that day. I use KA AP flour and keep the jar in the oven with light on. Can it be saved . It’s pretty watery too