you can use a tiny amount of dish soap in a spray bottle, then completely rinse the whole plant off, try really really hard not to let the water run into the soil!
here's what i do....
I just get some warm water and Dawn dish washing liquid in a bowl, set the plant in the sink, and with a paper towel just saturate each leave top and bottom with the soapy mix. Then give it a real good rinsing with lots of warm water...
If the weather is warm enough it's much less messy to do it outside!
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