I agree with beast, mainly because I do exactly the same, 2 weeks off work and watch the little fcuker like a hawk. Can't expect em to get it right over night but bollocking em ain't the answer in my opinion( I've learnt from my mistakes).
Just keep at it and it will sink in eventually, you will still find the occasional dog egg and puppy puddle but that's the joys of keeping em indoors!
Good luck, Matt