VPI cleaner clear tubes cracking

Mine has never developed any cracking. I don't use alcohol-based solutions, nor do I add any to the VPI solution. VPI actually suggests that adding alcohol is OK (up to 25%, I think)! So, they don't see it as a problem, but it might be worth asking them.

While I have the floor: I use the VPI cleaning solution. Are there real merits to using a different one or a homebrew?

Thanks Bob. I'll search for that other (RRL) solution.

4yanx...now I'm REALLY going to try it (the RRL, that is)! Thanks.