Diffuse brown spotting (unnatural) on psychopsis butterfly leaf

[Jopi]

Dear all,

That is true, the leaf with the spots is the same for days already. I think that infected leaf is getting a bit yellowish and discolored, but at the same time it is one of the older leaves. BTW the leaf looks completely normal on the backside! Keiki and the flower bud are luckily progressing.

I was wondering should I cut the leaf ??? Or just repeat the treatmant with hydrogen peroxide and/or isopropanol? Or wait to see how it will be for few days more?

Thanks everybody very much!

J.