Heavy oil residue on leaves

[Hugorchids]

Hi all,
This weekend I was given a couple NOID cattleyas, the plants look healthy but the leaves are covered with heavy oil residue, its sticky to the touch, the previous owners had them growing up near a skylight that captured a lot of smoke from cooking! Does anyone have any suggestions to remove the oil covered leaves without killing the leaves? Thank you!

[rangiku]

Try wiping the leaves with a half lemon juice half water solution.

[RosieC]

Possibly something like Lemon Juice would work. I've heard of folks using it to clean leaves and the mild acid can possibly cut throught the grease.

[johnblagg]

I have had no problem at all using Dawn dish soap to clean plants up ....just rinse them off after ...

[Gin]

Considering they used Dawn to wash oil soaked birds my vote is to use Dawn ..

[dounoharm]

soap is fine so is lemon juice, i have even scrubbed leaves lightly with a toothbrush to remove mineral deposits....gl