Could you get a job that doesn't test? I know in the States that's next to impossible, so...

The best remedy for home cleansing is first... NO SMOKING FOR AT LEAST A WEEK for it to 100% work. Some people claim to go only 2 days with no smoking, but many have failed. Even using detox drinks (me, for example)

My buddy lives by this: Get yourself some green tea. It is a natural cleanser and will cleanse your body of any toxins. Drink it daily for 5 days. Try to replace it with your morning coffee, or just fit a few cups in daily.

Water or Cranberry Juice. Lots and lots. Water I prefer as buying juice can be expensive.

Drink 1 cup, once a day, for 3 days, of vineger. Now, I cannot stomach that crap, a lot of people can't, but it works, so if you can't stomach it, just boost up your water intake.

Excerise. Sweat like crazy will speed up the process.

That's all pretty much, and don't bother with Detox drinks that supposed cover up the THC. Doctors are getting smarter these days and can detect them in a test. I got caught once using a $90 detox drink. My tesy came back clean, but he found a cover up in my urine. Busted!

Good luck.