Brown pseudobulbs on Cyrtochilum meirax

[Octopus]

Hello everyone,
5 weeks ago I got this Cyrtochilum meirax for my birthday and since 3 weeks it gets brown pseudobulbs. Can anyone tell me what is wrong with it?

The first one looked very ‘dead’ so I removed it. I realised that it was a completely independent plant with roots that had obviously died.
Now the next pseudobulb has turned brown, I have carefully cut it off and disinfected it with cinnamon, but I am afraid that the ‘disease’ (?) will spread further.

Care: The plant is dipped once a week and sprayed twice a day. It is in a north-east facing window.

Does anyone know whether it is a disease / infection / ... and how I can save the plant? Unfortunately, it's my first ‘demanding’ orchid and I don't know if I'm making a mistake.

Best regards
Laura

[estación seca]

What are your growing conditions? Temperatures day/night, relative humidity, Does it get only natural light?

[Octopus]

Unfortunately, our flat only has around 40% humidity. I hoped to be able to compensate for this with regular spraying.
It's about 21 degrees Celsius (70 degrees Fahrenheit) during the day and 18 degrees Celsius (64 degrees Fahrenheit) at night. It only gets daylight, but it's quite a bright room.

[estación seca]

The spraying doesn't help with humidity, since it is dissipated within a few minutes. Did it arrive in a pot, or bare-root? The main part of the plant is above the medium in the current pot. The old roots don't look good, but the newer roots are good. Has it grown any new roots since you've had it?

[Octopus]

I'm not sure whether new roots have been added. But yes, many roots and bulbs still look very good. I'm also unsure if some roots are rotten because they got too much or too little water..

The plant arrived in the small pot, the substrate looked like this about 2 weeks ago. Do you think it makes sense to repot it and put it in a small terrarium or glass container to maintain the humidity?

[estación seca]

Before you repot - what did you do with the plant after it arrived? It looks like you repotted, with most of the good roots outside the medium. But I may be mistaken. If you repotted, did you remove any of the old medium?

[Octopus]

No, I didn't repot them. I only took it out for the photo because I asked the plant dealer for help 😊 Only a little of the medium fell out. As far as I remember, there were already so many roots hanging out of the pot when I got it.