Snow foam, bikey no likey.

[Smokin Joe]

I'm yet to hear of anyone who's bike has suffered from using washing up liquid to clean it. In a bucket of hot water it it's so diluted you'd get more salt exposure riding near the coast.
Exposure is only for a couple of minutes whilst scrubbing then it is rinsed off.

Used it all my life.

Of course Muc Off will sell you some scientifically researched nano tech pink liquid for about 20 times the price and will be gone in 3/4 washes against dozens and dozens from an 80p bottle of fairy.

I've used washing up liquid on bikes, cars and motorcycles since Adam was a boy and never had a problem.

 

[PaulSB]

Fairy liquid for me without a problem.
1. Rinse off bike with hose pipe
2. Drop of Fairy in hot water
3. Wash thoroughly
4. Hose pipe to rinse
5. Clean hot water with a leather to finish
6. Polish with Mr Sheen

Job done

 

[screenman]

TFR as jet washer here. Finished with a light misting of well diluted tango before drying.