I lie on the bed so everything is flat and I am very "anal" about
heat & pressure during my application. I use my hairdryer to warm both my Eakin & my wafer right before placing them--separately. I then alternate heat & pressure over all for 3 mins or so once the wafer is on. I am very careful to shield my stoma from the heat with the cap from a can of mousse [courtesy of Another UC Wife]. Sure Seals go on at the end of my set-up. The heat & pressure step may add 3-5 mins to change time, but it is worth it to me to get a good solid application.
I switched to a whole Eakin, Convatec Convex Moldable [applied diamond-shaped], Sure Seals and my heat & pressure routine all at the same time and something finally clicked and saved my sanity. I am now consistently getting 7-10 days wear, up from only 2-hrs to 2-days wear. Some discourage the use of stoma powder and barrier preps, but I use both and it has never presented a problem.
There is one other thing I do during my heat & pressure step to help solidly set the Eakin & wafer. There is a product available for quite a bit of money, but there are alternatives to the concept. It is the Equalizer by Stomaplex--nothing more than a piece of rubber tubing. You can see how it works and there are a couple of videos within this first link below. I went to Lowe's and bought a foot of rubber tubing and my son cut me off a 2-inch piece--works perfectly. The other 3 links are products I found for next to nothing in the PVC plumbing department at Home Depot & Lowe's. They can be purchased in different sizes depending on stoma size and flange size. All the same concept--even and steady pressure on the wafer around the stoma where it may be hard to get fingers into. Even the top of a correctly sized empty bottle would work.
http://shop.stomaplex.com/stomaplex-the-equalizer/