While I'm a newbie at this site, I've enjoyed enemas all my life, especially the taking of them. Most of my what not to do's I see here already, but sometimes a thing has to be repeated, lol.
Never take alcohol in an enema; it's just too dangerous.
Always clean the equipment thoroughly, with lots of soap and hot water after, and then use alcohol inside and outside of anything that gets inserted.
Always lubricate well.
Any time you use soap, coffee, or other additivies, after you've gotten rid of that enema, you need a clear water rinse, to get the additives completely out.
Never hang nor hold the bag higher than 18" or so above the person getting the enema. Even if the person is horribly stuffed, just give it time: water always finds its own level.
Be careful with volume: ALWAYS listen to your body, or to the person you're giving the enema too.
Be careful about sharing this fetish with new lovers; many will claim an interest at first, assuming they can wean you of it when the relationship is firmly established. N.B.: they CAN'T, lol. 😃