My neighbor, who is new to gardening, has aphid in her greenhouse in a
big way. Does anyone know the best way to deal with it?

She gave me some plants, which all went right into the kitchen sink and
got sprayed with the sprayer, to mechanically clean the bugs off. I haven't
used soap yet, but will, if one more spraying doesn't do it.

I've never had aphid in a greenhouse (touch wood) so don't know what it
takes to clean them out. She bought some lady bugs, but I don't know if
that'll handle the problem without human intervention...

Suggestions?

TIA,
Jan