Mine doesn't always "boil" over. I've also learned not to keep it in the fridge. She live on the stove next to the kettle. Also, give her about 3 hours from feed to use. This recipe is before you feed. With mine, I rarely have discard because I make bread(s) 2x a week 2 days in quick succession so there are daily little feeds until the day before and days of actually starting the bread and buns. Then, after the feed for the dough, I put her in the sun.
Enjoy the scones. It's a good place to start. Happy Sunday to you, Lizelle!