For a fresh accident, absorb as much as possible before cleaning. Press with clean towels and change them as they become wet; do not scrub the liquid sideways.
Strip the bed and separate damp layers
Launder sheets and the mattress protector according to their labels. If moisture reached a platform or foundation, separate the surfaces so dampness is not trapped between them.
Use a small amount of cleaner
An enzyme cleaner labeled for compatible textiles can help break down organic residue. Follow its contact time and test for color or finish change. Do not saturate the mattress.
Extract moisture again
Press with dry towels until they pick up little moisture. Use a wet vacuum only if it is suitable for the task and the mattress manufacturer permits that method.
Dry completely before remaking the bed
Ventilate, use gentle air movement, and leave the mattress uncovered. Do not add bedding while the interior still feels cool or damp.
Old urine may have reached the foam
If odor returns in humid weather or after several surface treatments, residue may be deeper than household cleaning can reach. Repeatedly wetting the top can make drying harder; professional cleaning or replacement may be more realistic.
Never combine chlorine bleach with ammonia, acids, or other cleaners. Moisture control is as important here as odor treatment.
Sources
- American Cleaning Institute — Cleaning Tips — Household cleaning, product-label use, and surface-safe cleaning practices.