This excludes medicinal intervention. This is not medical advice; I assume you’re an adult and you accept the consequences of your actions.
Peppermint has documented anti-fungal properties. I have tested and discovered that peppermint tea daily will help keep the thrush down. I’ve also started drinking some mint or peppermint tea after drinking milk or eating sweets like ice cream. If I don’t drink peppermint or mint tea for a few days, the thrush can start to make a comeback.
Probiotics. Prescript-assist probiotics suggest you empty a capsule into your mouth to help combat the thrush. I suggest doing this at bedtime. It helps. Also, taking a probiotic normally of course helps.
Sinus washing. If you get congested when you have thrush, it could be traveling up into your sinuses. Sinus wash can help remove the thrush, slow it down. I prefer the bottle style and recommend this brand. Make sure you use distilled water. Please, use distilled water.
Depending on your situation, you might also find a tongue scraper to be useful. You have to be careful because a tongue irritated by thrush is more likely to bleed. You can use a tongue scraper too much.
If you get really desperate, you can mix hydrogen peroxide and water together and gargle. It helps to tilt your head back and let the mixture sit for 5-10 seconds. You need a quarter of the amount of peroxide compared to the amount of water. Put some water in a cup, and just a tiny bit of peroxide. Do not swallow. Do not do this very often because it could also effect the positive bacteria in your mouth.