MCPS Never Cleans Artificial Turf Fields - Ever. (Fairfax Does Deep Cleaning)

At the October 22, 2015, Montgomery County Council Education Committee meeting, Councilmember Marc Elrich asked MCPS' James Song the following question about artificial turf maintenance:

Elrich:  "Are you doing cleaning and disinfecting?"

Song: "No."

You can listen to the rest of this discussion in this video clip from the meeting.

Why is Fairfax County doing deep cleaning of their public artificial turf fields and MCPS does no cleaning or disinfecting?

 https://youtu.be/bd7_4koIvlo