Try going through a rise and discard process. Feed with a 100G of water and 100G of flour in the morning. Toss all but a big tablespoon and add 100G of water and 100G of Flour. Do this until the starter doubles in size after several hours or sooner. Repeat in the evening and morning for two or three days.
The discard can be use for pancakes, waffles, crumpets and etc.
One problem with rising is if the sourdough goes too sour in the recipe.
about 5 hours before starting the recipe, mix a bit tablespoon of starter with 90G of water and 90G of flour. You will get a doubling of the starter and the smell will be faintly sour, a bit nutty. Use 90G of this to start the bread and then save the rest in the fridge for the next loaf.
This recipe works very well and was posted here: