Can anyone recommend the best household flea spray. I did my whole flat with R.I.P spray from he vets which cost £19 6 months ago. It took 3 doses but eventually they went. THEY HAVE COME BACK!!!!!!! I thought this was supposed to last a year. I have read about Indoorex which you can buy online for £10 ish. What do other people use or is R.I.P really the best?