According to regulations, cleaning must follow which specifications?

The correct choice emphasizes the necessity of adhering to both NFPA 72 and the manufacturers' specifications when cleaning smoke detectors. NFPA 72 provides critical guidelines for fire alarm systems, including the maintenance and testing requirements for smoke detectors. Compliance with this standard ensures that detectors function effectively and reliably in protecting lives and property from fire hazards.

In addition, manufacturers' specifications offer specific instructions regarding the proper cleaning procedures for their devices, which can vary based on design and technology. These specifications may include recommendations for cleaning materials, techniques, and frequency, which are essential for maintaining the integrity and performance of the smoke detectors.

Utilizing the combined authority of NFPA 72 alongside the manufacturer's guidelines provides a comprehensive approach to ensuring smoke detectors are kept in optimal condition, thus enhancing their reliability and effectiveness in emergency situations.