Masdevallia striatella leaves yellowing

[ejramer]

I recently bought a Masdevallia striatella and to my dismay found that it had some patches of scale. I cleaned those off with rubbing alcohol yesterday, and today some of the leaves (the ones I cleaned and possibly a couple others) are turning yellow in blotches. Could this be from the rubbing alcohol? Or are my conditions not favorable? I have it in indirect sunlight (sheer curtain, patches of shade from other orchids) during the day, approximately 70-75* F. At night I've been moving it outside to benefit from the 50*F nights. Is the moving between indoors and out too much stress? I would leave it outside all the time but I don't have a good growing area, only a west-facing patio that gets very strong afternoon sun and none during the rest of the day. I'm in an apartment so I can't set up or plant anything outdoors except on my patio.
First photo: before cleaning scale. Second photo: after cleaning scale (5 days apart).