Based on the context and the answer, generate a question. 

Context: I find life hard enough . But here I am , doing a spring " cleanse . " I am cranky because I am exhausted . I am exhausted - or feeling my exhaustion - because all I ' ve been drinking is green tea , and not my usual 2 large cups of coffee in the morning plus limitless cups of black tea throughout the afternoon , and then decaf black tea in the evening .

Answer:

It is a type of fast - with some allowed liquids



What is a " Cleanse " ?