Keep the place clean.
Poor sanitation is a dreadful risk.
Wash buckets, coolers and the like. Never put new flowers in with old and never put them in a bucket not previously washed. Use cleaning agents developed for the floral industry. Clean the inside walls, floor and ceiling of coolers as often as you would clean a bathroom. Mold growing on cooler surfaces, as well as flower and plant debris, can increase ethylene levels and the chance of disease and insect spread.