Ha. I think I have a bottle of that Insect Remove somewhere, I should dig it out, should help for rinseless washes. I got it from Werkstatt.
It's too bad no one is importing the Carlack products anymore, I think PBMG had taken over the import on Klasse, I presume they still do. It must be pretty complicated because Werkstatt created their own brand, before in later years selling the actual Carlack products, unless it's just that Carlack figures the name, Car-lack, doesn't translate well.
I had tried to convince one of the more entrepreneurial importers/store owners to take a look at Carlack when Werkstatt went under, but nothing came of that. I just don't really understand the "secrecy" around Klasse and Werkstatt, they were always black holes with minimal information and no customer support (that I recall from Werkstatt). IIRC the Klasse site had no phone number or email address, back before PBMG took it over.
Hmm...I see Autogeek doesn't carry Klasse, but AutoForge does, so I guess the Klasse import business stayed with M37 in the split.
EDIT: I see Carlack, which was a German company, was sold in 2012 to Swiss company Max Lehner AG, which seems to go by Maxolen. That may have been what led to the downfall of Werkstat.