Try to add some friction material between the filter and the wrench. Wrapping electrical tape "backwards" around the filter wrench loop, that is with the sticky side out, will enable you to get a grip on the filter. Hope this helps...
What type of wrench are you using ? There is the type with a loop and handle that fits around the filter and then there is the type that fits over the end of the filter and you use a rachet to remove the filter. I had to use the later on Sat. Good luck - Bob
Ive got a 3 legged filter wrench that fits over the end of the filter can use a 1/2" or a 3/8" square drive the more pressure that is applied to it the tighter the grip gets have once or twice put three large dents in the filter because it was so tight but always works
I had to run a screwdriver through my filter that was put on by local HD store. Put them on hand tight with a little lube on the seal. For the past 2 years I have been using the chrome filters you can get from V-Twin. They have a hex head on the end so you just take a 5/8 socket, long extension, and your ratchet and screw them right off. It really simplifys and speeds up the procedure.