Treating walls and ceilings in a home for odors with a liquid is often more effective than using a gas for several reasons:

Targeted Application: Liquids can be applied directly to the affected areas, ensuring better coverage and penetration into porous surfaces where odors may linger. This targeted approach is more effective at neutralizing odors at their source.

Longer Contact Time: Liquids tend to linger on surfaces longer than gases, allowing the active ingredients in odor-neutralizing solutions to work more thoroughly over time. This extended contact time increases the likelihood of effectively eliminating odors.

Controlled Concentration: With liquids, you can control the concentration of the odor-neutralizing solution more precisely, ensuring that it is strong enough to combat stubborn odors without being overwhelming or damaging to surfaces.

Less Dispersal: Gases can dissipate quickly and may not reach all areas where odors are present. Liquids, on the other hand, can be applied in a controlled manner, ensuring that they reach all affected surfaces for comprehensive odor elimination.

Safety: Some gases used for odor removal may pose health risks if inhaled or if they come into contact with skin or eyes. Liquids can be handled more safely and are less likely to pose a risk to occupants or pets in the home.

Overall, using a liquid for treating walls and ceilings in a home for odors offers better control, effectiveness, and safety compared to using a gas.