In a pinch, I can change my bag in under 15 minutes. My problem with doing it quick, is I don't get a good seal. I have gotten 8 days wear, once out of an appliance. I have an ileostomy.
Here are my thoughts on your problems, with getting a good seal. Please realize, i'm very new to this, but this is my two cents. One, whatever you do, do NOT lay with stool on your skin. You will lose skin very very very quickly. I speak from experience. Two, when you change your appliance, I find doing it in bed, is the easiest. But make sure there is something leak proof underneath you, so that should you have an explosion, you don't have to change your sheets (oops!!). Three, make sure all of your skin is intact around your stoma. Also, make sure it is DRY. DRY is very important. If it isn't dry, you will not get a good seal. I use plain white paper towels. I have used toilet paper, but didn't get as good of a seal. I've used washclothes at the hospital, with poor luck also. But now that i've started using plain white paper towels, and water, i'm having better luck. Three, just because you have a flat tummy, you do not have to use just one type of an appliance. I use a one piece, convatec appliance, with convexity. I also wear a belt with it. Four, I use heat, and lots of it around my appliance. I have a blow dryer, that I turn on warm, and blow dry around the appliance after I apply it. I use a minimal amount of paste. I have a divit beside my stoma, where I tend to leak. I apply a bead of paste there, and when I put the eakins seal on my appliance, I pull out a piece at the top, and roll it into a bead, and put it on the appliance where I tend to leak. I also have some medical spray adhesive that I spray on my appliance, and the eakin's seal, to help things stick. I only clean my skin around my stoma with plain water, and paper towels.
I keep a roll of paper towels, beside me when i'm changing my appliance. I have several wet ones, but most are on the roll still and dry. I only use the wet ones to clean off the old paste and any stool that leaks. I have several different templates I use, I draw that on my new appliance, and cut the hole before I remove the old one. I then apply the eakins seal, spray adhesive, and then take off the old one, clean up any messes, and make sure everything is intact, and dry my skin. Then I apply the new appliance. The biggest thing i'm always looking for is any sign of skin breakdown. Before i apply the appliance, I take a dry paper towel, and dry all my skin, again. After I put the new appliance on, I take the blow dryer, and warm the whole appliance, and apply Hy tape around the edges, and put my belt back on. Whatever you do, don't use the blow dryer with your belt on. You'll melt the ears. <G> (oops!!)
My stoma was very flat, and sunken in when I started with the new wound care center. She's now poking her head up all nice and pretty. She's a double barrel, and the mucus side is where i'm having leaks. Until I started using the convex appliance, and a belt, I was having a lot more leaks. I didn't go eight days. I was lucky to go 24 hours.
do you have a wound care nurse, who specializes in ostomies who can help you? Home health nurses aren't always the best to help you with your ostomy. I'm a nurse, and until I had this, I didn't know a fourth as much as I do now about appliances and taking care of stomas. There are multiple types appliances out there. Keep trying, and good luck!!
Good luck!! it does get easier, and better.