Tiny Ants in Mérida: My Local $2 Fix That Finally Worked

Every house I’ve ever rented or lived in across Mexico — without exception — has come with an army of teeny, tiny occupants. Hormigas, or hormigitas as they’re affectionately called, are everywhere in this city. They’re smart, they’re persistent, and if you’ve spent more than a week here, you’ve already met them.

So how do you actually get rid of tiny ants in Mérida?

After more than six years as a foreign resident in this city, I can tell you there are basically four routes — and only one that consistently works in my kitchen without me having to keep buying things.

• Hire a professional pest control company
• Use store-bought ant and insect products
• Make a DIY natural or borax-based solution
• Use my landlord’s $2 trick — baby powder

I’ll get to the baby powder. First, the part nobody likes to hear.

📌This article was originally posted on December 20, 2020. It’s been updated in 2026 for the best local tips and tricks I know!

Start with the boring stuff (because it actually matters)

Before any product, spray, or trick has a fighting chance, you have to remove what’s attracting the ants in the first place. In Mérida’s climate, this is non-negotiable:

1. Clean up food spills the moment they happen
2. Store anything sweet or sticky in airtight containers
3. Take the trash out daily and keep it in a bin with a lid
4. Sweep the kitchen, pantry, and laundry room often
5. Wipe grease off counters, cabinets, drawers, and the sink area

I clean my house regularly. I am, by most standards, a tidy person. And I still get ants. So if you’re reading this and thinking “but I just mopped” — same. Welcome to Mérida.

Before I found the baby powder solution, my go-to was a 50/50 apple cider vinegar and water spray. It works in the moment. The ants disappear. And then they come back in a few hours, marching along the same invisible highway. I researched, experimented, and dug around online for years before stumbling onto the fix that finally stuck.

A quick aside on the local affection for these creatures: there’s actually an esquina plaque in Mérida Centro honoring the ant — La Hormigita de Oro, or the Little Ant of Gold. The hormigitas aren’t just neighbors here. They have a cute nickname and a corner named after them. Here’s more on the esquinas of Mérida if you’re curious about Centro’s old street signs.

Now, let’s look at your real options.

Option 1: Hire a professional pest control company

There are plenty of pest control companies in Mérida. Some offer general fumigation; others specialize. If you go this route, ask two questions before anyone sprays anything in your house:

• What chemicals are being used?
• How toxic are they?

The company I personally recommend is Bichos Fum.

A few practical notes if you’ve never had a Mérida house fumigated before. You’ll want to deep-clean the house the day before — not the day after. Ask the technician how long to wait before you start cleaning again, because the residue is doing the work. With some treatments, that’s a few days. Many foreign residents I know book a hotel for those nights so they’re not tempted to scrub anything.

In my own long-term rental agreement, the house is fumigated twice a year. Does it eliminate the tiny ants in Mérida entirely? No. It knocks the population down and keeps it manageable between treatments — but I’m still doing interim maintenance the rest of the year.

Option 2: Store-bought ant products

Walk into any Walmart, Chedraui, or Home Depot in Mérida and you’ll find an entire aisle of options. The most commonly recommended product among my neighbors is Cebo, a clear ant gel sold in small syringes at Home Depot. You squeeze a tiny dot near where the ants are entering, the workers carry it back to the nest, and the colony collapses from the inside.

Other things you’ll see on the shelves:

• Aerosol sprays (Raid, H24)
• Electronic pest repellers — if you go this route, buy one with an electromagnetic pulse, not just ultrasonic
• Powder formulations and DIY foggers

Everyone in Mérida has their own ant-killing gospel. Borrow ideas, try a few, and see what fits your house and your tolerance for chemicals.

Option 3: DIY and natural solutions

If you’d rather not spray anything industrial in your kitchen, you have options.

Borax (ácido bórico) with sugar water or beer. Mix a small amount of borax with sweet liquid and put it in a bottle cap near the ant trail. It’s safe around pets when contained, and it works on cockroaches too. My landlord used this on roaches and swears by it. If pets and kids aren’t an issue, a light dusting of borax powder along ant trails works the same way — they walk through it and carry it home.

The water moat. I’ve read (but haven’t personally tested) that you can place the legs of wire shelving or pantry racks into shallow dishes of water. The ants can’t cross. Add a pinch of salt or a few drops of Clorox to keep the mosquitoes from breeding in your moat. If anyone has tried this — write me, I want to know.

Cinnamon. Sprinkle it along door thresholds, windowsills, countertops, and other entry points. I haven’t relied on this one, but it’s a popular natural deterrent and your house smells incredible.

Option 4: The $2 baby powder trick (this is the one)

Here’s the answer I wish someone had handed me on day one.

I had never heard of using baby powder for ants until I moved to Mérida. I lean organic. I’m cautious with chemicals. And one afternoon I had cleaned every counter in the kitchen, walked out for five minutes, and turned around to find the tiny ants back. In formation. On the surfaces I had just wiped.

I called my landlord — she’s lived in this house for decades — and asked what she actually uses.

Her answer: baby powder.

I said what?

She said baby powder.

I bought a bottle for the equivalent of about two dollars, sprinkled a thin line along the backsplash and the base of the wall where the ants were coming in, and waited. The trail stopped. Not slowed — stopped. I’ve been using it ever since, in every problem area: behind the coffee maker, under the sink, along the bathroom baseboards, around the trash bin.

A few practical notes from years of using it:

• A little goes a long way — you want a fine, visible dusting, not a snowdrift
• It works because ants won’t cross talc (it disrupts their pheromone trails and clogs their tiny breathing structures)
• It’s safe around children, pets, and food prep areas as long as you keep it off the surfaces you eat from
• Reapply after you mop, or anytime the line gets disturbed
• Any cheap brand works — you don’t need the fancy one

It is, hands down, the cheapest and most effective thing I’ve found for tiny ants in Mérida. No fumes. No syringes. No appointments. Just a $2 bottle from the farmacia.

A realistic expectation

You will never have an ant-free house in Mérida. Anyone who tells you otherwise either just had their place fumigated yesterday or hasn’t lived here long enough yet. The goal isn’t elimination — it’s management. Keep your kitchen clean, pick the method that fits your household, and accept the hormigitas as one of the small costs of living in this otherwise extraordinary city.

The good news: once you find the trick that works for your house, you mostly stop thinking about it. For me, that trick is sitting on the laundry room shelf in a $2 bottle.

Foreign resident planning your own move to Mérida? Start with our neighborhoods guide or book a one-hour consultation to talk through what daily life here is really like — hormigitas and all.