What to expect about dirty oneself?

You don't have to expect anything bad. The solution to all your concerns is a good thick beach towel under you. This will take care of any spillage, either lube or semen, and will give you confidence and peace of mind. 

I place down a towel (folded in half for extra thickness), to catch any lube that runs.

I have some folded sheets of toilet paper ready for when it's time to remove the device. When I'm removing the device, I grip it with some toilet paper, so I don't touch anything directly. I also wrap the device in the other sheets of toilet paper, so I can put it down on a surface until it's time to wash it.

Outside of that, I don't need to take any other measures. I don't ejaculate, urinate, or produce a troublesome quantity of pre-cum during a session. Some people pre-cum more than others, but due to the dribbling nature of it, I think the towel underneath would catch it.

Many guys use a bath or other towel. I have used an old t-shirt, and even a thick sock doubled over. Whatever you use, it's not helpful if you are obsessed about possibly wetting your bedding. I suggest that you lay 1, 2 or even 3 bath towels under you on the bed and pull one over your dick if to keep your sheets safe (if you cover up during). if you're really paranoid, use a plastic shopping bag under your towel so no moisture gets through. Count on showering after and it's all good.

Again, protect your bedding well so that you can be totally unconcerned with a mess, otherwise you will be unlikely to have orgasms or super orgasms.

You could coat your room in plastic like the do in mafia movies before someone gets clipped 😉

A towel and even a plastic bag underneath like Pablo said above. 

When i first started i did mine in the bath. The warm water relaxes the body and washes away any mess. Eventually i started on the bed and took a shower after and be sure like others said to use towel during sessions just in case. 

Hi and thanks for your reply. I'm confused. I didn't understood if does the dropping of liquids coincide with the moment of Aneros orgasm? 
And where does the liquids drops from?

I mean excluding the involuntary drops of lubricant.

@banana555 

It's mainly lubricant you have to be concerned with. It's possible that you will leak precum or semen from your penis, or that your orgasms will make you ejaculate. Or maybe you will chose to end your session by jerking off. Another thing that can happen from time to time is the Aneros just slips out. 

Other times you may want to pull it out to add more lube during the session. And at the end of the session, you will want to have a place to put your toy and some way to wipe down your hands and your butt before you go clean up. All more reasons to have that towel under you.

@banana555

Besides a big towel under you, have some face clothes nearby. They are handy for a quick clean up. I also have a small plastic container (actually it’s a medium sized yogurt container) that I’ll drop the used lube shooter into and when I’m done with the session I drop the used device in also. I’m pretty far from my bathroom from where I do my sessions, so the plastic container is convenient for transport, plus it doubles as a small wash basin for the devices. I just put liquid soap in and hot water to wash them. 

Well depending on the guy i know when i first started the Aneros i would get a ton of pre-cum and by alot i mean one big string from my balls to the floor and thick. Sorry if that is to graphic but honesty about it might help.

So even during a super O' there is no loss of liquids from the genital to concern about? 

Precum should be easy to clean with water. The problem is cum, it can be a true problem on clothes.

Posted by: @banana555

The problem is cum, it can be a true problem on clothes.

Have your session—NAKED! 😉

Posted by: @banana555

So even during a super O' there is no loss of liquids from the genital to concern about? 

By definition Super-O's are non-ejaculatory events, however, men have reported ejaculatory orgasms as a result using their Aneros devices. It is impossible to predict if you are going to have a Super-O or HFWO's or simply a non-ejaculatory prostate orgasm (HFO), all variations are possible.

Posted by: @banana555

Precum should be easy to clean with water. The problem is cum, it can be a true problem on clothes.

If this is your main concern the simple solution is to wear a condom during any Anerosession, if you accidentally ejaculate you've got it contained for easy disposal.

Good Vibes to You!