A drip of water-based paint is a timing problem before it is a product problem. In the Season 24 demonstration, green paint went onto a rug, a hardwood floor, and a printed tile on purpose. The result depended on how fast the rag showed up, not on a labeled miracle cleaner.
The segment used water-based paint and later treated the dried film as acrylic. Oil paint, epoxy, and paint that has cured for days were not part of the test. If that is what you spilled, this sequence does not apply.
Set out clean rags (opens in a new tab), a wet-dry vacuum (opens in a new tab), a little detergent (opens in a new tab), white vinegar (opens in a new tab), baking soda (opens in a new tab), and denatured alcohol (opens in a new tab). The rags, soap, and vacuum are for a wet spill. Vinegar, baking soda, and alcohol are for a film that has already dried.
While it is wet
Fresh water-based paint on carpet, hardwood, or tile is still soluble. The longer it sits, the fewer options you have, so start before you look for a specialty cleaner.
Carpet
Soak a clean rag in warm water with a squirt of detergent, then dab the spill. Do not scrub, which drives pigment deeper into the fibers. Rinse the rag and repeat until the color is gone, then use a wet-dry vacuum to pull moisture and leftover pigment out of the pile.
Hardwood that is still wet
While the spill is wet, warm water and a little detergent lift it without cutting the floor finish. Keep the rag damp rather than dripping so you are not flooding the seams.
After it has dried
Finished wood
A vinegar and baking-soda spray lightened a dried spot in the demonstration but did not erase it. Denatured alcohol on a fresh rag cut the dried acrylic and left the sheen. Do not use a chemical stripper on a finished floor: it takes the paint and the finish together.
Tile
On a printed tile, denatured alcohol lifted a dried drip and left the pattern. Work a small area and stop if the color printed into the tile starts to move.
Solvent safety
Denatured alcohol is flammable. Open a window, keep it away from a pilot light or heat gun, and do not follow it with a solvent stripper on a floor you want to keep.
DIY confidence
Wet cleanup: approachable. A rag, warm water, and a little detergent are the whole kit if you get there immediately. The usual failure is waiting until Saturday.
Dried acrylic on a finished floor: careful. Denatured alcohol worked on the demonstration floor and the printed tile. It is still a solvent. Test a hidden spot, ventilate, and stop if the finish dulls. A chemical stripper is the wrong next step on a floor you intend to keep.
Surface prep before the paint goes on is a different job. The bulkhead repaint in Season 23, Episode 4 is about primer on metal, not about spills.
Where this was shown
The full sequence is in Ask This Old House Season 24, Episode 14. The same episode also covers three-way switches and a split-rail fence; those are not paint advice.