What it is. our alcohol-free otto home spray is formulated with an innovative odor-neutralizing technology that targets and reduces unsavory odors by more than 98%*, while imparting a lasting clean and aromatic scent. how it works. instead of masking odors, our home spray technology neutralizes odors by binding with malodorous molecules to create a new fresh scent. the unique spray pump allows for a specific pattern of droplet delivery that maximizes neutralization of malodor while diffusing the luxurious and edgy scent of otto throughout your space. + kitchen malodor reduced more than 95% immediately after use and lasts up to 2 hours*+ bathroom malodor reduced more than 99% immediately after use and lasts up to 2 hours*+ pet malodor reduced more than 98% immediately and over 99% reduction by 90 minutes**based on an independent 3rd party clinical research study with 15 trained sensory evaluatorsstudies performed in test chambers in varying sequence at time zero, before product application, and again at 10-minutes, 1-hour, 1. 5-hours, and 2-hours after product application. all bathroom and kitchen malodors were generated with a surrogate chemical mixtures. for pet malodors, our testing facility used dog blankets were collected from the local animal humane society (woodbury, mn); used cat litter clumps were collected from two feline rescue foster homes.