Not getting any foam. When this is attached to ...

Not getting any foam. When this is attached to my pressure washer it takes away most of the power. I assume I must be doing something incorrectly. albeit I haven't figured it out yet. Have used hot water mixing half and half with car soap. Might try different soap but when compared to online videos the foam is coming out at a greater force than on mine. I'm using a 1500 psi pressure washer. Minimum required in description is 1000 psi.

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