The key advantages of hiring a person or company that knows it's trade is important when it comes to residential cleaning services.

professionals are in high demand nowadays especially those that have passed the IJCSA RCS Certification. In the requirements to  complete this certification it is in high demand that they certify also in:

1) JCSA Bloodborne Pathogens Certification-- which teaches about OSHA's Bloodborne Pathogens Standards which is a federal regulation(29CFR1910.1030) that prescribes safeguards to protect workers against the health hazards from exposure to blood and other potentially infectious materials and to reduce their risk from this exposure. 

2) IJCSA Chemical Hazards Certification-- which teaches about chemical substances that could potentially cause harm to the human body or even cause loss of life.Chemical Hazards(according to OSHA) and toxic substances pose a wide range of short or long term health effects therefore safety and avoidance are always important and a key priority.

And 3) Customer Service Skills Certification to provide the necessary assistance and advice to customers relating to  chemical products, cleaners and agents and on how to better use the IJCSA services which range from cleaning services, forums , and training courses.