I personally suggest you don't. Have a dish of salt water your crab can bath in. Insure the water isn't to deep. Just deep enough to cover to majority of there body, not submerge them. Place your crab in the water once so it knows were it is. If it runs out let it, your crab will bath when it needs a bath.
You take a crab in the bath tub and smear it on your face
None. They can do it for themselves.
yes, but if you supply water and there is enough for them to completely submerge in they will bath themselves as they feel needed.
you don't need to bath them because they take a bath themselves. i think you only do that once a week if they didnt do it. just dip them in water...
Most likely your crab overheated. A crab needs tepid (not hot, not cold) water to bath in and drink from. It does not take long to heat a crab to death.
yes you can. only you have to use very very shallow water!
You fill the water bowl ( or any water pond thingy you have ) enough for the crabs completely submerge but not enough that they drown. They will bath them selves as they feel needed.
Yes, hermit crabs don't usually fight. You could give the new hermit crab a bath so that it smells the same as the other hermit crab in you tank.
Put your new hermit crab in a bath of distilled water (make sure the water is no higher than the crab's legs) and let him/her crawl around in it for a while. Then, put your crabs back together and see how it goes. If that doesn't work, watch them for a while and maybe give them both baths. That happened to my crabs, but now they like each other.
Only if they have no way of getting out of the water. They will climb out when they need to but you shouldn't put them in a situation where they are unable to get out of the water on their own if they need to.
It is not necessary to bathe your hermit crabs but if you would like to bathe them, this is what I do: -fill a container with enough dechlorinated water to fully submerge your largest crab. -Place the crab in the water upside-down -Leave the crab in the water for two minutes. Don't leave it in the water for too long or it will drown. Once you place the crab in the water upside-down, it will flip itself over and begin walking around or just sit there.
It depends on the size of your crab. I would suggest just enough for them to cover the majority of there body but not enough for them to be completely submerged.