From this article:
Molecular Mechanisms of Anti-Inflammatory Action of Erythromycin in Human Bronchial Epithelial Cells: Possible Role in the Signaling Pathway That Regulates Nuclear Factor-B Activation
http://aac.asm.org/cgi/content/full/48/5/1581
"EM (Erythromycin) had no effects on the redox environment that regulates the activation of transcription factors, including NF-B and AP-1.
It is interesting that this article implies that the use of oxidants or antioxidants may increase the bactericidal effects of Erythromycin. Perhaps they add an oxidizer to the ChemiClean in addition to Erythromycin?