Four steps. The only one people get wrong is the second.
A Solana mixer breaks the connection between the wallet you pay from and the wallet you finish with. Identical amounts go into a shared pool; the same amount comes out somewhere new. Because every deposit in the pool looks the same, nothing in your withdrawal points back at yours.
How many deposits share your pool, and how long you leave between the two halves. That is genuinely it. A withdrawal that lands a minute after its deposit is matched on timing alone regardless of how good the proof is — see what happens inside the pool. Hopping through extra wallets afterwards adds nothing; every hop is public.
Losing the note, which is final. Sending an amount that is not an exact multiple, which gets held and returned. And withdrawing too early, which fails silently — you lose the privacy and nothing warns you.
Start a mix, or read what it costs first.