To degrease your bike’s transmission (chain, cassette, derailleurs, crankset and pedals), use a degreaser or a degreasing agent, as well as a soft brush (you can also use a toothbrush for more precision when cleaning the chain).
Then leave the product to work for 5 minutes. Once this time has elapsed, rinse your bike thoroughly, paying particular attention to the areas that have been treated with the product (but avoid using a high-pressure jet, which could damage your bike).
For cleaning, use a cleaning product and a good sponge or microfibre cloth to scrub (you can also use a round brush for hubs and hard-to-reach areas). Do not use washing-up liquid, as this will damage your bike.
Rinse your bike again.