Blood cleansers/purifiers?

At the moment i'm doing a Bowel Cleanse (i'll finish in about a week). After that i'm doing the parasite, kidney, then liver ones. I've been reading lately how blood cleansers/purifiers help with skin problems (i have eczema). I found out that Flora has some great herbal teas for blood cleansing, they recommend them for skin problems. So my question is, when should i start taking blood cleansing products? Do i start taking them after i finish liver, after bowel, or when? Thanks.