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Whether TSA’s transparent bag rule for liquids is enforced or not, checkpoints are strict about the 3-1-1 rule — meaning all liquids in carry-on luggage can’t be more than 3.4 ounces and they must all fit in a single quart-sized bag. But leave it to travel expert Samantha Brown to come up with a packing trick for detergent that’s both clever and TSA-friendly. When it comes to staying clean on the go — whether you’re cleaning your reusable water bottle (like this travel-handy Zulu Ace leak-proof bottle) or washing something in the sink — Brown says making your own detergent sponges is the ultimate hack.
“Moisten a sponge with dish washing detergent and let it dry,” Brown shared with Forbes. “Then, cut it into nine tiny squares and put them in a Ziplock bag. Now I have something to clean with and it won’t count against the liquid limit.” These sponge squares won’t register as a liquid at security and are perfect for cleaning water bottles, cups, or even clothing in a pinch.
Brown picked up the tip from a flight attendant, which makes sense, considering cabin crews are pros at staying tidy while traveling light (here are some other flight attendant-approved packing tips). It’s an easy hack that solves a common travel headache — you won’t have to hunt for detergent at your destination, and you’ll avoid spills in your toiletry bag. It’s also a great option for travelers headed to remote destinations, hostels, or places where amenities are limited. And even if you aren’t flying, Brown’s sponge trick is a cleaning item you’ll want to bring along for a stay at a hotel.
More smart ways to pack detergent while traveling
In addition to Samantha Brown’s clever sponge hack, there are a few other ways to bring along detergent without breaking TSA’s liquid rules. For laundry, single-use detergent sheets are one of the easiest options. They’re light, pre-measured, and completely dry, so they don’t count as a liquid at security.
But another option you may not have considered are powdered detergents, packed into a small container or even a baggie. As long as it’s clearly labeled and kept in a reasonable quantity, it should pass through security without issue. If you are bringing along any powder greater than 12 ounces, though, it will need to go in a separate bin at the security checkpoint.
For spot cleaning or handwashing on the go, soap bars are incredibly handy. If you’ve collected a stash of mini hotel soaps (no judgment here), this is a great use for them. Keep it wrapped up or in a travel soap case — like this Quatish leakproof soap holder— and you’re good to go. Castile soap is also a well-known multi-purpose option that you can use for everything from showering to brushing your teeth and washing the dishes. These options save space, prevent spills, and make last-minute laundry or cleaning easy-peasy — whether you’re backpacking through Europe or heading off on a family road trip.
