The Cascade is a sealed unit. To clean it you have to send it back to TacSol.
I bought mine from a local guy here in Houston. A different local guy put 30,000+ rounds of 22lr through one with no ill effects, at least none that I could hear, that's what sold me. I have around 4-5k through mine and no problems so far, other than I left Powder Blast in it overnight and it ate the loctite, allowing me to screw off the threaded endcap.
I don't currently have a threaded 22mag, but I've heard a Cascade/22mag combo and it was hearing safe, more noise from the crack than the muzzle. I don't know your area, but you might be able to find someone who has one you can try with your rifle, that would be best.
BTW, I don't want to come off as a Cascade TI fanboy, it's like everything else, it has it's strengths and weaknesses. For me the strengths were sound suppression (including FRP), light weight, availability,familiarity, and price.
BTW, TacSol has had great customer service. I called them and asked what to do about the thing coming apart, they said I could send it in, or they could just send me some loctite. I told them not to bother and picked some up at the parts store, but they were willing to do whatever I wanted. Great folks.