Working with a drug containing lethal doses of fent, like pressed Roxi 30s, and expessially a time release patch, can be very dangerous. It must be kept in mind at all times fentanyl absorbs through the skin, nose, mouth or really anywhere it can come in contact with your body it can absorb. So be cautious not to get gel on your hands or in your mouth, you wont od from a small amount but getting doped out without meaning too can be a scary experience for sure.
Cut the patch open slightly and squeeze a tiny tiny tiny dot of gel onto a 5 inch square of tin foil. Quickly tape the patch close, or place it in a completely air tight bag to keep it from drying.
Get a straw or similar object and place it in your mouth with your lungs empty of air. Light the other side of the foil with a lighter and guide the fentanyl around the foil making sure it stays on the foil and doesn't drip off. Soon it will began to vaporize so suck gently through the straw and chase the trail of vapor masking sure your sucking most of it through the straw and into your lungs. Once you either have vaporized the entire fentanyl glob, or got a hit take the flame away from the foil and suck the last of the smoke up
I don't think it matters how long you hold the smoke, but to be safe hold it for 5-10 seconds then blow it out. Eventually youl feel sedation typical with sub-euphoric doses of morphine except this feeling is stronger than with morphine and very sedating and heavy. After a few minutes apathy kicks in along with some euphoria and warmth. At higher doses you can get a small rush, and a high full of bliss and nods.
Keep in mind smoking fent can be 2-5xs as strong as oral fent so dose accordingly. Also many say you will reach an od trying to chase the same euphoria as morphine derivitives so just appreciate fent for what it is and don't dose to high.