If your coffee tastes watery, the problem isn’t your Keurig—it’s your K-Cup choice. Some brands pack less coffee than others. Try a stronger roast or a “bold” setting.
Also, run a cleaning cycle with just water. Your machine might be carrying leftover flavor from a previous brew. Nobody wants a French vanilla-flavored espresso, unless you’re really into chaos.
If all else fails, try using the smallest cup size setting. Less water = stronger coffee. Simple math, really.