If you’ve ever poured your morning coffee only to find a puddle spreading across the counter, you know the frustration. A leaking coffee maker is not just messy—it can waste coffee, dull your morning ritual, and even damage your countertops if left unchecked. But before you toss it in the trash or call a repair shop, know that many leaks are surprisingly easy to fix with a few household tools and a little patience. Let’s walk through the most common culprits and how you can get your brewer back in shape.

First, figure out where the water is coming from. This will narrow down the problem fast. If you see water pooling underneath the machine, the leak is likely inside the base. If water runs down the side of the carafe or drips from the top, the issue is probably with the carafe, the lid, or the brew basket. If water sprays or drips from the handle area, you might have a crack in the water reservoir or a loose hose. Each of these scenarios has a different fix, and most don’t require a professional.

One of the most common causes of a leaky coffee maker is a cracked or warped carafe. Over time, glass carafes can develop tiny hairline cracks, especially if they’ve been knocked around or placed on a hot burner after being empty. Even a small crack will let water seep out as you pour. The fix here is simple: replace the carafe. Check the model number on the bottom of your machine and order a new one. If your carafe has a plastic rim or a lid that doesn’t seal properly, that can also cause drips. Try cleaning the lid’s rubber gasket with warm soapy water and a soft brush. Sometimes mineral buildup or a stray coffee ground prevents the lid from seating tightly. If the gasket is worn or torn, you can often buy a replacement gasket online for a few dollars.

Another major suspect is a clogged or dirty brew basket. When coffee grounds build up in the basket or the filter basket holder, they can block the flow of water. That backup forces water to overflow the basket and drip down the sides of the machine. The solution is to give your brew basket a thorough cleaning. Remove the basket and any removable parts, then wash them in hot, soapy water. Use a small brush or an old toothbrush to scrub the mesh filter and the small holes where water comes through. If you use a permanent filter, make sure it isn’t bent or damaged. While you’re at it, clean the showerhead—the little disc above the basket where water drips out. Mineral deposits from hard water can clog those holes, causing water to spray sideways instead of straight down into the grounds. A mixture of equal parts white vinegar and water run through a brew cycle (without coffee) will dissolve those deposits nicely. Run a couple of fresh water cycles afterward to rinse out any vinegar taste.

Sometimes the leak is from the water reservoir itself. If you have a machine with a removable water tank, check the bottom of the tank for cracks. Plastic can become brittle over time, especially if you’ve set the tank on a hot surface or dropped it. A small crack can often be sealed with food-safe silicone sealant, but it’s usually better to replace the tank if you can find one. If the tank has a valve at the bottom that connects to the machine, make sure that valve is clean and free of debris. A grain of coffee or a bit of mineral scale can prevent the valve from sealing properly, causing a slow drip whenever you pour in water. Gently clean the valve with a damp cotton swab.

Don’t overlook the water hose connections inside the machine. If your coffee maker is older, the rubber hoses that carry water from the reservoir to the heating element can develop tiny pinhole leaks. These are harder to spot because they’re inside the housing. You might notice a slow accumulation of water on the counter under the machine, even when it’s not brewing. To check, unplug the machine, remove the drip tray, and look underneath with a flashlight. If you see moisture on the internal components, you’ll need to open the base. This is the trickiest repair, but still doable. Look for screws on the bottom and sides, then carefully remove the outer shell. Once inside, locate any hoses that appear damp or cracked. You can replace a short section of hose with the same diameter tubing from a hardware store. Slide the new hose onto the fittings and secure it with small hose clamps or zip ties. Be gentle—plastic fittings can break easily.

Finally, consider the drip tray. Some machines have a float that indicates when the tray is full. If the float is stuck, or if the tray overflows because you haven’t emptied it, water can spread across the counter. This isn’t really a leak from the machine itself, but it’s an easy fix: empty the drip tray regularly and check that the float moves freely.

Before you start any repair, always unplug your coffee maker and let it cool completely. Water and electricity don’t mix, and you’ll be working near both. If you’ve tried all these steps and your machine still leaks, it might be time to retire it. But more often than not, a simple cleaning or a cheap replacement part will have you brewing again without a puddle in sight. A little DIY detective work saves you money and keeps your morning routine smooth.