Please help with giant leaf insects

[Nephaleim]

Alright so, I bought some leaf insect nymphs last year, and up to now they have been doing fine! But a week ago, they started dying one by one! I've been trying so hard to help them, but I don't know what I can do anymore. Only one is left now, and she is fairly active and eats well for now. She had a bit of a rough molt and got hurt.
I'm trying to keep her alive because I want to have the eggs. Please tell me what I can do to keep her alive.
I have a fairly big enclosure, bramble leaves in a glass with water, some miscellaneous branches around the enclosure. I mist twice a week with rain water. I keep the enclosure near a heater now that it's winter.

As you can see from the image bellow, she looks kind of dry, and I don't know why! Please just tell me what I can do.

The second image is of her sister, who I expect to die soon. She's become very stiff and unresponsive compared to the other.


UPDATE:
okay so I noticed the second bug has a hard lump on her butt. Like there is a massive dry bunch of feces in her. I don't know if I can get that out nor how big is it or why it's there, but I'll try to soak her butt in some warm water tomorrow if she's still going to be alive.

 

[LizardStudent]

Do you know roughly how old these are? How long exactly have you had them? I know some leaf/stick insects have typical lifespans that are under a year, its possible it could just be their time. Other than that, any signs or possibility of parasites?

 

[Nephaleim]

Do you know roughly how old these are? How long exactly have you had them? I know some leaf/stick insects have typical lifespans that are under a year, its possible it could just be their time. Other than that, any signs or possibility of parasites?

They aren't adults yet! I've had them for.. 5-6 months maybe? Also I don't know how to spot parasites. If there are any parasites that affect leaf insects..

 

[Albireo Wulfbooper]

Do you know what the humidity in your home is? In winter some homes can become very dry, so you may need to mist more often. Moulting issues are often associated with dry conditions.

 

[Nephaleim]

Do you know what the humidity in your home is? In winter some homes can become very dry, so you may need to mist more often. Moulting issues are often associated with dry conditions.

Hmmm I don't know. I've had stick insects before, and they seemed okay on my room temps. I'll have to check that.

 

[Hisserdude]

I mist twice a week with rain water. I keep the enclosure near a heater now that it's winter.

They're probably drying out too fast, heaters dry the air around them a LOT... You probably need to be misting them far more often, maybe even put moist substrate at the bottom of their enclosure just to raise humidity to make up for the heater evaporating all the nearby air humidity.

 

[Nephaleim]

They're probably drying out too fast, heaters dry the air around them a LOT... You probably need to be misting them far more often, maybe even put moist substrate at the bottom of their enclosure just to raise humidity to make up for the heater evaporating all the nearby air humidity.

Alright I'll try to mist 3 times a week, but then I'd leave the lid of the terrarium open for a bit for more air circulation.

 

[goliathusdavid]

Alright I'll try to mist 3 times a week, but then I'd leave the lid of the terrarium open for a bit for more air circulation.

I think thats definitely your problem. Leaf insects like higher ventilation, and higher humidity. So I would recommend at least one side, ideally top, to be mesh to increase ventilation. Then I would mist twice a day. I know that's a lot more than what you have been doing but is standard care for most phasmids in zoos in the US.

 

[MasterOogway]

You should probably be misting these guys at least daily, if not twice a day, and have some killer ventilation. Even with that, these girls can be tricky.

 

[LizardStudent]

Agree, I think misting three times a week is too sparse for a species that usually dwells on islands and in jungles. I would spray daily, but without good netted or screened ventilation it will likely cause them problems. Ventilation in the form of holes or slits to me is not ideal for these. Not saying it can't work, just that a screen will likely work better