Why the advice is not universal
Powder can settle into pile, backing and underlay, remain as residue or become difficult to remove with a household vacuum. It may also interact with previous products or irritate a person who is sensitive to dust. A fragranced powder does not identify or remove the source of an odour.
Check the carpet before using powder
Identify the fibre, backing, dye, pile and manufacturer guidance. Test in an inconspicuous area and check whether the vacuum is suitable for fine powder. Do not use baking soda on an unknown, damp, delicate, antique or damaged rug without appropriate advice.
If powder has already been used
Do not add water or another chemical to make a paste. Let the carpet remain dry, ventilate safely and vacuum only as the carpet and equipment instructions permit. Stop if residue remains, the pile changes or the vacuum struggles, because repeated passes can damage fibres.
Find the odour source
Persistent smell may come from a spill, pet incident, damp underlay, subfloor, drain or another source. Dirt2Tidy can quote suitable carpet or domestic cleaning after the source and material are assessed, while water damage, mould-like growth and contamination need specialist escalation.
