It's the only one I've dealt with that has this problem. Normally I take an old screwdriver and attach a jumper wire to it. I attach the jumper wire to ground (the frame if the chassis is still attached) on the power connector side of the fuse, then touch my screwdriver to the other side. Be ready for a big BANG! Even knowing it's coming will make you jump. It's a lot bigger than when you discharge a tube. Sometimes it takes a chunk out of the screwdriver, which is why I use an old one.
If I'm doing a chassis that has already been removed (make sure you don't touch the bottom until you've checked it), then sometimes I use an old pair of insulated pliers. I spread the jaws (while holding the insulated handle) and touch the jaws to both leads of the filter cap leads on the bottom. Usually get a big BANG there too.
If you're especially paranoid, wear gloves...