definitely don't use dish wash liquid. I use this spray on hose off stuff called motomuck Repco sells it and I think it is like the s100 product but less expensive. I spray it all over the engine and wheels but not on the polished stuff tank etc, I'll put a link up tomorrow. it's the large container in the middle, price approx $50 for 5 litres
Harley shop here still sells S100 engine brightner Benno, alongside it's more expensive version.
Is that Sun City GM, none of the dealers here in Brisbane sell it anymore.
Here's a link I just noticed it is NZ made, this is the best cleaner I have used on motorcycles and the best thing is it is just spray on and hose off (no elbow grease required)- https://motomuckproducts.com.au/products/motomuck-cleaner-5-litre
I wouldnt have expected a fuckin Queenslander to know an intelligent question.