When I hand wash my car using `AutoGlym Bodywork Shampoo Conditioner` should I use warm or cold water? or doesn't it matter. The product doesn't specify one way or the other. Your advice would be appreciated as always.

If it doesn't state otherwise on the bottle then it should be fine. Temperature can have an effect on some waxes/sealants but that is usually when very hot water is used.

Some shampoos do state the correct temp to use; for instance Zymol Autowash says "cool water only".

TSo, what would you use, O.B-B? I've only used it once and that was with cold water...but it hardly `frothed` at all. Thats what made me think that warm would be better to gain more suds.

Either whirl your hand around in the bucket as it is filling or use a hose/pressure washer to fill the bucket. That usually agitates the shampoo enough. If you live in a hard water area that might mean it won't foam as well either.

Different shampoos foam at different rates as well. I don't use the AG one so I can't comment on how "foamy" its supposed to be.

As long as the water feels slick and slippery thats all you need to safely remove dirt. Bubbles are just extra.

I always use warm water

It aids to lift the dirt I find

Thank you both.

I always use warm water, It aids to lift the dirt I find

Warm water seems much better at shifting insect remains, my Dad swears by a cloth in hot water to shift the bugs off his bikes.