Complex sentence: Common hospital disinfectants are ineffective against "C. difficile" spores and, in fact, may promote spore formation, however, disinfectants containing a 10:1 ratio of water to bleach effectively kill the spores.
Split into simpler sentences: Common hospital disinfectants are ineffective against "C. difficile" spores and may actually promote spore formation. However, disinfectants containing a 10:1 ratio of water to bleach effectively kill the spores.