Improperly maintained process equipment can compromise yield and add to both particulate and non-particulate contamination.
Dispensers have to be monitored and replaced on a regular basis. Even the appropriate chemical-resistant container cannot be used indefinitely. There is likely to be contamination buildup over time as well as some leaching of materials of construction into the cleaning agent. A cleanroom equipment maintenance schedule must include an audit and inspection. If necessary, expunge ancient dispensers.
This cleanroom tip was taken from “A Stitch in Time–Maintaining Critical Cleaning Equipment,” which appeared in the March 2013 issue of Controlled Environments.