Walls collect more grime than most people realize, from kitchen grease to handprints, built-up dust, and even cigarette smoke stains. Over time, it all adds up.

That’s why before you paint, patch, or refresh your space, proper surface prep is the key to smooth, lasting results.

If you’re wondering how to clean a dirty wall effectively as part of your paint prep, SOLVABLE® TSP Liquid Cleaner & Degreaser is a VOC-compliant TSP wall cleaner that delivers a powerful, no-scrub clean that’s safe for DIYers and effective enough for pros. VOC-compliant means the product is made with lower-odour, safer chemicals that reduce emissions, protect indoor air quality, and minimize environmental impact.

From early prep to finishing touches, SOLVABLE®  has the solutions to help you get the job done right. Your Project, Solved.

Why Wall Cleaning Matters

Before you grab your brush or roller, it’s worth taking the time to understand why wall cleaning is so important:

  • Helps paint adhere properly
  • Removes buildup that can show through finishes
  • Prepares surfaces for patching or repairs
  • Gets rid of gross grease, smoke, and environmental residue

What You’ll Need

  • SOLVABLE® TSP Liquid Cleaner & Degreaser 
  • Bucket of clean water
  • Spray bottle (if not using ready-spray version)
  • Chemical-resistant gloves
  • Safety mask
  • Safety glasses
  • Tarp or drop cloth
  • Cloth or sponge

How to Clean a Dirty Wall in 3 Simple Steps

  1. Spray the Wall

Generously spray SOLVABLE® TSP Liquid Cleaner & Degreaser onto dirty or greasy areas. 

Cover the full surface evenly for the best prep results.

  1. Wait 15 Minutes

Let the cleaner sit and break down grime. 

No need to scrub—just give the solution time to work. 15 minutes should do it!

  1. Wipe Clean

Use a cloth soaked in clean water to wipe the wall.

Remember to rinse the cloth as needed, especially for larger or heavily soiled areas.

Tips for Best Results

  • Work from the top down to prevent streaks
  • Test a small area for colorfastness on painted walls
  • Lay a tarp to catch drips or runoff
  • Repeat in problem areas if needed

Prep Like a Pro for Your Next Paint Job

Painting over grease or grime can ruin even the best paint job. 

With SOLVABLE® TSP Liquid Cleaner & Degreaser, you can clean greasy walls quickly and safely, giving your paint the perfect surface to adhere to. 

Whether you’re repainting or simply freshening up, clean walls are the first step to flawless results!

Click on the video below to watch the detailed how-to video.

Get the Right Solution for Wall Prep

Don’t paint over grime and then regret it. Clean it first, no elbow grease required. Pick up SOLVABLE® TSP Liquid Cleaner & Degreaser online or in-store, and get your walls truly ready for what’s next.