Are the moans from gas users or diesel users? Which system do you use? Hot water is by far superior in cleaning than cold water. You need to learn how to use it.
That would depend on the work,on my maintenance cleans it cant
get any easier barely cleaning dirty glass and hot really wouldnt make
any difference,as someone else has stated i would still make the same
amount of brush movements and rinse the same,if at all.
Heavily soiled work,filty first cleans,heavily soiled con roofs baked
on in the summer i would agree with the superior cleaning comment
Its not essential, come spring though it will be another tool
to use when i deem necessary