Now take apart and clean your reservoir.
Clean ressi same way as shock body, with brake clean
Leave the bracket on the ressi, put the ressi bracket in a soft jaw vise.
Take the hose off the ressi, drain all oil oil out from the hose end.
Now push the ressi cap down into the ressi just enough to get at the retaining clip, it is kind of like a wrist pin clip.
Remove it with small screwdriver or pick.
Might have to use a big socket and hammer to gently tap the cap down a little, depending on how slugged up ressi is.
See the retaining clip groove on ressi body
To get the bladder/pressure cap out of the ressi body
Screw a tire valve installing tool onto the schrader valve of the ressi cap and pull out the cap and bladder.
To help remove cap, you can put your air hose into the bottom of ressi where the shock hose attaches to ressi.
If you don't have a tire valve install tool, pressure in the bottom of ressi should work.
Be careful with how much pressure you use, don't want to make a projectile out of the cap.
Also remove any burs on ressi body you might have created taking out the retaining clip, this will make sliding out the cap easier.
DO NOT put pressure in the valve in the ressi top cap to remove the cap. It won't work.
You want pressure under the bladder from the shock hose end to push the bladder and cap out together from underneath.
Note the molded in o-rings on the bladder, they seal/seat on the cap and the bladder/cap assembly slides out of the ressi body.
Inspect ressi bladder for any rips or perforations