The jade artifacts unfortunately were universally very well cleaned, with no residues surviving.
The nodules were cleaned with 0-2 % iodine in ethanol, and hairs, pads and bones were removed.
The tank had been last cleaned more than 5 years before and debris was found at the bottom of the access to the tank.
In the day preceding the slametan, the food must be bought and prepared, the dishes and glasses wiped, and the house cleaned.
Environmental swab specimens were taken from several locations of the food processing equipment after it had been cleaned using routine cleaning procedures.
The collectors were read every morning after fog drip had stopped, and were levelled and cleaned of any litter present.
Adolescent girls were also involved in fish-processing, helping adult women: they cleaned grills, packed fish, filled cans with different preservatives and so on.
Some microhabitats of fish are less likely to be cleaned than others.
