Buy a humidifier/dehumidifier with a physical switch or potentiometer (knob)...

Example: https://smile.amazon.com/AquaOasisTM-Humidifier-Ultrasonic-Humidifiers-Bedroom/dp/B08FKYJHCF/ref=sr_1_5?dchild=1&keywords=humidifier&qid=1618891026&sr=8-5

AquaOasisTM Cool Mist Humidifier {2.2L Water Tank} Quiet Ultrasonic Humidifiers for Bedroom & Large room - Adjustable -360° Rotation Nozzle, Auto-Shu https://www.amazon.com/dp/B08FKYJHCF/ref=cm_sw_r_cp_apip_UXlmt23kPK6iH

Works great, get about 6 days out of it before needing refilled

This one will work fine in a 4.4 cu ft and up.

I got this one off Amazon Limited-time deal: AquaOasis™ Cool Mist Humidifier {2.2L Water Tank} Quiet Ultrasonic Humidifiers for Bedroom & Large room - Adjustable -360° Rotation Nozzle, Auto-Shut Off, Humidifiers for Babies Nursery & Whole House https://www.amazon.com/dp/B08FKYJHCF/ref=cm_sw_r_cp_api_glt_i_dl_PHY8FKZMSV1BDM8XRD9Q?_encoding=UTF8&psc=1

I think it works great. I fully fill it at night and even on the highest setting it doesn’t run out of water throughout the night. & if it does run out of water through the night it has an auto shut off

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AquaOasis™ Cool Mist Humidifier {2.2L Water Tank} Quiet Ultrasonic Humidifiers for Bedroom & Large room - Adjustable -360° Rotation Nozzle, Auto-Shut Off, Humidifiers for Babies Nursery & Whole House https://www.amazon.com/AquaOasisTM-Humidifier-Ultrasonic-Humidifiers-Bedroom/dp/B08FKYJHCF?&linkCode=sl1&tag=an0e75-20&linkId=0eeeab9b3eb575c6ddf59766f129ae62&language=en_US&ref_=as_li_ss_tl

https://www.amazon.com/dp/B08FKYJHCF?psc=1&ref=ppx_yo2_dt_b_product_details

This is what I got and it seems to do well. Place it near the tank for best results.

Also putting a towel over the top of the tank (if it's a mesh top) can help keep humidity in.

Misting will help as well, so also do that, but this will be the long-term fix for it.

for a larger one, i also own this one, which works for a lot more plants and isn’t too big

https://www.amazon.com/AquaOasisTM-Humidifier-Ultrasonic-Humidifiers-Bedroom/dp/B08FKYJHCF/ref=mp_s_a_1_2_sspa?crid=2HLKBDMNG8Q6N&keywords=humidifier&qid=1640187459&sprefix=humidifier%2Caps%2C96&sr=8-2-spons&psc=1&smid=A3VF...

I don't use one personally, but have seen a lot of people on CPAP and sleep forums talk about this by their bedside and how it really helps.

https://www.amazon.com/dp/B08FKYJHCF?psc=1&ref=ppx_yo2_dt_b_product_details

I ordered this one a while back and it's been great so far. I placed it next to the tank and it keeps it nice and humidified.

https://twitter.com/amazing911deals/status/1457950861771091972

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26% OFF + COUPON ON SITE! NOW: $34.95! Amazon's Choice [Amazon] AquaOasis™ Cool Mist Humidifier {2.2L Water Tank} Quiet Ultrasonic Humidifiers for Bedroom & Large room - Adjustable -360° Rotation Nozzle, Auto-Shut Off, Humidifiers for Babies Nursery & Whole House https://www.facebook.com/amazing911deals/posts/114126944404141 https://www.amazon.com/dp/B08FKYJHCF

 

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This one:

AquaOasis™ Cool Mist Humidifier... https://www.amazon.com/dp/B08FKYJHCF?ref=ppx_pop_mob_ap_share

I typically dont run belly heat on enclosures, but you can. Just need a thermostat with 2 probes. humidifier. You can dial the output out pretty good. Then get a inkbird humidity controller

Something like this maybe