Here’s an article about Improving Glucose Clearance on site.
The short version is: improve metabolic rate through quality sleep, ample calories (especially carbs), prefer saturated over unsaturated fats, engage in sensible and sustainable exercise that you enjoy, and reduce stress. Also, pay attention to when you have bouts of ‘low blood sugar’ and act quickly to intercept them with something salty/carby like some crackers or dried fruit or something, and avoiding fluids. By keeping the body from ‘crashing,’ you avoid activating the stress hormone system and keep the body in a pro-metabolic place where blood sugar issues are uncommon.
Over time, by supporting the body and improving metabolic rate, glucose clearance improves, and blood sugar normalizes.