Why do so many reviewers complain about the smell of pet odor cleaners?

This is the most consistent complaint across every brand we read. Multiple verified-purchase and community reviewers report that some formulas have an unpleasant chemical or 'masking' scent that can be as off-putting as the original odor, and a few say a strong application made them feel unwell for days. If scent sensitivity matters to you, fragrance-free options exist, though they draw more mixed effectiveness reviews.