I'm trying to remove 23-year-old AC barrier hose from aluminum line so I can replace them. I split the crimped ferrules and removed them. The hoses are stuck on. I'm sure they've permanently deformed to fit tightly around the barbs. I can rotate them but can't pull them off the barb fittings on the aluminum line.
I tried cutting a slit in the hoses but I'm having trouble cutting all the way through with a knife, and I don't want to use anything more powerful since I could damage the fittings and prevent a good seal.
I considered putting a torch to the aluminum to get the hoses to melt a bit, but I don't want get the aluminum covered in gunk I can't remove.