I have been dyeing marabou almost every weekend. Fly dye and Veniard both make Claret I think. Do a presoak of materials overnight before dyeing. I use warm to hot water, Dawn liquid dish soap, and liquid fabric softener, the one free of dyes and perfumes.
Throw the materials in there and stir it up.
Next morning, rinse and wash your materials in liquid Dawn and your ready to dye.

Bob