"My family wouldn't have to scratch for every penny" - "Dusty", "dust", "grubby", "sticky", "fragile"
Dante (chapter 1): Dante introduces his family's class and how they are susceptible to financial struggle - as they are a single-parent family of colour without a university education. The curtains being described as a lexical set of grime could reflect poverty
CONTEXT: Despite being one of the richest countries in the world, the UK has one of the highest levels of economic inequality in the developed world, with the richest 20% earning, on average, twelve times that of the poorest 20%. The rich get richer and the poor get poorer.