It's not a confidence thing at all if you have used both you can make your own mind up if it's worth using hot or not.
If like me you will find out hot defo cleans better than cold any day of the year even if used on regular cleans.
Better at cleaning what ? until you have compared yourself to what other guys are achieving then your just talking rot, I haven't
tried hot because I am achieving the results I need without it.
Its like coming on here and trying to convince somebody who can clean a property in 10mins that if they where using hot
they could clean it in 10mins.
I've found hot works much better than just using cold on the following:
tree sap - sticky or solid sap on glass and frames
road film - badly soiled frames, glass etc
algae / lichen - on frames, sills, cladding, signage, conny roofs etc.
oxidation - on frames, cladding etc
baked on bird strikes, bug poo etc - be it on glass, frames, cladding, solar panels etc.
builders splatter - softens mortar, paint etc so makes it easier to remove.
sea salt - common on coastal jobs (I don’t live by the coast but has been said by others)
I could go on about the difference of using hot as opposed to cold but to be honest think I would be wasting my breath as like I mentioned before you have to try it to find out for yourself. Then you can make your own mind up if you want the option to use hot or not instead of keep banging on about it