The 44-year-old has stopped seeing a psychologist and insists she sorts out all her troubles by getting heavily involved with chores in the home.
Carter, who has two children Billy Ray, seven, and Nell, three, with partner Tim Burton, told the Radio Times: 'I've discovered the therapy of cleaning.
'I used to be retarded domestically but now I understand that if you put your house in order, it gets your head in order as well. I know all about Cillit Bang, which I use on the cooker.'
She added: 'I've done therapy and it was helpful but with acting I dream every day, scream and get the tensions out.
'And you're paid for that rather than paying for a therapist.'