How to wash soft fruit? I bought a pack of blackberries from the supermraket and the label said to wash before use. I tried that and it completely ruined them.

I tried running them under a tap (faucet). Ruined. I tried dropping the fruit into a bowl of water. Ruined. I tried running them under a slow trickle of water. Not ruined but also not washed.

How, please, am I supposed to wash soft fruit like blackberries?
Probably the easiest way to do it is to just gently pour the blackberries into a basket strainer, then lower the strainer into a bowl of water. Then you can just lift the strainer out and the berries will come with it, no fishing required.