The frequency of vaping indoors can definitely affect the likelihood of wall staining. The more often someone vapes in an enclosed space, the greater the chance that residue from the vapor will settle on surfaces like walls and furniture. This residue contains a variety of chemicals, including nicotine and flavoring agents, which can leave behind stains and discoloration over time. If a person is vaping with a high-powered device or using e-liquids with high concentrations of certain ingredients, this may increase the amount of residue produced and further contribute to wall staining. To minimize this risk, it's important to limit indoor vaping as much as possible and take steps to properly ventilate any areas where it does occur.