Top-notch not mediocre. I mean a shop where the cleaner...

1. takes his/her time

2. knows what he is doing

3. Has a lot of experience

4. treats the bicycle like it's his mother's

Obviously, I expect to pay a premium price for such a service. Was just in Hanoi and asked a good shop there to remedy three nights at seaside (salt and sand). I was not satisfied. I would have disassembled more, used a toothbrush, done it by hand, and NOT used an air hose which could make it worse.

What do you pay for top quality bike cleaning in Bangkok? If I paid over $1000 for my bike in Singapore I don't want a cheapo cleaning.

firstly 1000 bucks is NOTHING for a bike, try cannondale shop on 26 sukhumvit or probike on sarasin.

be clear in your expectations.

Motor bike cleaning yes, no way I let anyone else than myself clean my bicycle.