Follow the method-specific instructions
Confirm re-entry time, ventilation, sleeping arrangements, laundry status and which surfaces can be cleaned. Do not assume advice for heat applies to residual treatment or vice versa.
Keep children and pets away for the period stated on the label or by the professional.
Record evidence, not just sensations
Log specimens, monitor catches, spotting and rooms with dates. Skin reactions may appear late and cannot by themselves prove current activity.
Photograph captures beside a scale when possible.
Use the agreed review point
Ask what is expected between visits and what triggers an earlier call. New-room activity, missed preparation or uncertainty about product contact deserves prompt discussion.
At follow-up, compare the original evidence map with new results.
Sources and further checks
Open the source before acting on information that may change, including council services, prices, tenancy rules and product labels.