Hello and welcome
Such a great name, Professor von Nibbles
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Honestly don't worry about spot cleaning yet if it's only 2 days
Spot cleaning is "as and when needed" basically, but for the first couple of weeks it's best to leave everything alone while they settle in. Changing things around or cleaning can really stress them until they have developed a feeling of security and scent marked it all. However yes, the pee does need spot-cleaning at some point. If he uses a litter tray you would maybe empty that once or twice a week, but he is probably peeing underground somewhere at the moment. But the rule of thumb at first is- if you can't smell it, don't worry! Because with so much bedding it will be fine and he is probably sleeping at one end of his underground hide and peeing at the other end. So I would wait a while, and in a couple of weeks, check the underground hide area. Maybe when he's out of the cage for a while so it doesn't freak him out
. After two weeks is also a time to think about offering him a "taxi" for out of cage taming time/playpen time if he hasn't being pestering to come out before then. until then you could start with talking to him through the cage and offering him treats through the bars I'll let him get used to your presence and scent. It can be a bit skitty if they come out of the cage too early - they're still making it home and marking it as a territory and getting used to it. It's time and patience a bit at the beginning which is quite hard when you want to just pick them up and cuddle them But it depends on his personality some of them are very friendly and wanting to kind of come to the door earlier than two weeks
If he's a baby hamster they don't always develop the best toilet habits until they're a few months old But once they've had the P Spot cleaned it does tend to make them have better habits because they don't like their sleeping area being disturbed at all!
When you do come to spot clean if you find he has pee'd on his hoard (if he's actually started hoarding yet some of them don't learn to pouch straight away) then that is tricky. Dried food is hoarded can be left for really quite a long time, but if it has been pee'd on then that does need removing when you spot clean his pee generally. However this can make them quite frantic if all their hoard is removed and they feel invaded and a thief has been around! So the key is to leave a tiny bit of food behind that is dry If you can find two or three bits that are still dry, and also put a handful of new food back in the same place. They accept that as long as there's still some food there in the hoard
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Have you seen much of him yet?!
It all sounds very exciting it always is with a new hamster but it but we worry at first And then it becomes easier
Just rely on your nose at the moment, when you don't know where he is peeing.
In time Some hamsters are very good at cleaning out their own peed on substrate. They don't particularly like having it sitting around So you if you leave it sometimes you may find a big pile of smelly substrate out for you to take away! They pull clean stuff in and push the dirty stuff out. but baby hamsters can take a while to get into these habits.
If you can smell pee before for a couple of weeks Is up, Then you could just put your hand under the bedding and have a feel around. But sometimes you can't find anything. which is OK because it probably means he's only peeing in one really small area And once you know what that is you know where to go next time.
Does he have a sand bath? sometimes they start using that as a toilet. But usually if they have a house with rooms they will use one room for sleeping and one for peeing in.
Congratulations on your hammy Professor von Nibbles, very cute name!