New snails not eating & not very active in tank

[zebaki]

I got my first two snails 9 days ago. They are achatina reticulata, about 8 months and both of them were carrying eggs already. The first 4 days I took them out at least once a day and tried to feed them since they weren't eating in the tank, they also got a bath which they absolutely loved. After two days I got them to eat a small amount of banana and some of their cuttlefish. One of the snails ate a small amount of a thin slice of cucumber as well in the first days (this was inside the tank). Outside of the tank they are very active, but inside the tank they have mostly been sitting in one of the corners sleeping.

I was told they might be acting weird because of stress (moving to a new place and me handling them every day) or maybe because they have eggs, so I stopped taking them out every day but have moved them inside the tank 2-3 times and put them on their food. They're not eating at all and they mostly just move around right after I've sprayed them with water or moved them. I've tried cucumber, different lettuces, sweet pepper, carrots, blueberries, banana, tomato - even cutting it up different ways and sprinkling it with cuttlefish (this was how I finally got them to try the banana). I guess I'm mostly worried about them not eating cuttlefish. The person who rehomed the snails gave me a big piece at about 15cm long and said that the snails would go through that very quickly, and they've just made small (I think) holes in it. One of the snails has a pretty bad dent in his shell and a small crack, and he's the one who has been eating most of the cuttlefish, but 80% of what he has eaten of it has been outside the tank.

I think their environment is alright. I have a digital thermo-/hygrometer which tells me that they have 20-23 degrees (c) and 80-99% humidity. Even though the humidity is high the substrate looks pretty dry at the top so I spray a little there and also on the snails even at 99%, is this wrong? They haven't dropped their eggs yet so I'm worried they hate their vivarium.
I use coconut fiber (I think it's called, English isn't my native language) and they also have a piece of wood to climb on, a plant and sphagnum moss. The tank is very small, just 40x30x30 but I'm going to get them a new tank at 80x40x40 probably today.


My questions: 
Could stress or eggs cause the snails to behave like this?
Should I keep handling them since that's the only times they've eaten or should I leave them be?
How fast should two healthy, happy snails go through a big (15cm) cuttle piece? 
They are about 10cm in shell length, does this sound small for a retic of 8 months?

I'm already so fond of them and I constantly worry they don't like me as their snail parent, I just want them to be happy and healthy.

[peas]

How long has it been like that? Not long ago I had a snail that randomly stopped eating, growing and doing much of anything despite it's tank mate being fine.

With mine it took them like two weeks or so before they started being active again and nothing really had changed. No idea why it happened, but I can understand your stress. One thing I did do is that every few days I would give the snail a bath.

Coconut fiber (or coco coir as it's called sometimes) is a great substrate, I use it for a lot of my exotics.

Though one thing you should definitely want to do is getting the tank temperature up a few degrees, 20-23 degrees is perfect for an A. Fulica but A. Reticulata need slightly higher temps try to get it to 25-28. Some people recommend sticking a heat mat on the outside if you have a glass terrarium, but as I use a wooden enclosure what I did was move my tank to a warm room in the house (smaller, radiator reasonably close but not too close to the tank).

Humidity sounds good though. Try not to let it get too swampy though if you're spraying so often with 99% humidity. 80% is good for retics.

[zebaki]

Well, I got them feb 19th. And they've been as I described since then.

However, I did get them the bigger terrarium 2 days ago (a few hours after my first post), another piece of wood/bark, a bit more/new substrate and I gave them another bath and some mushed banana before putting them in their new tank. They didn't eat much but was more keen to investigate the new tank (especially the new piece of bark) than they've been before. After a few hours I moved the tank closer to the radiator even though they seemed to be doing better, so now they have a steady 23 degrees and humidity is down to around 80.

Yesterday I put in a small piece of egg and moved both snails to the feeding dish - and both ate! Both even nibbled a tiny bit on the cuttlefish and on the day old cucumber and carrot in the dish! Both of them have pretty much hung around the feeding dish since then, and ate more cucumber, carrot and on the cuttlefish without me "forcing" them. They've been sleeping pretty much, but when they're awake they are much more active, so I think they just hated the small tank!