My cat has had problems with fleas for 6 years now.... a nightmare and it has cost a fortune... She had a flea collar from the supermarket and was fine...then she started getting fleas on and off...so I got frontline from the vet - it was fantastic - no more fleas... for 18 months - 2 years - then for some reason it stopped working and I only realised when she had loads (with flea collar I would comb her every month and look for dirt - ready to change the collar but frontline was 'so good' I didn't ! and none of us humans get bitten - or if we do we don't react so don't realise) -even got the vet to apply the drops but still we had a problem...(and yes they were in the house and I didn't treat with sprays etc cos I had a baby, but did steam and hoover regularly ) - eventually got fed up - it was costing a fortune and not working...we were infested - I switched back to a flea collar - one type worked for about 9 months (kept levels down at least) then didn't - so I swapped to one with a different pesticide - worked then didn't ...Last summer I took the flea collar off and decided to try a different approach...a flea comb (I have a long tooth one - IME the short ones are rubbish - my sister didn't think her cat had fleas until I persuaded her to get a longer tooth one) and NO pesticides.First I flea combed her every day - made it a routine and didn't necessarily groom every bit of her but did spend at least 10 mins - live fleas I dropped into boiling water with dish soap in it... I did this for a month - maybe missed one or two days..I vacuumed her bed sleeping areas every few days and area where I combed her - did a quick vacuum of main areas. I thought about buying a flea attractor/trap but then realised I already had the best one you could get - a cat! After that I flea combed her every two days and once a week I vacuumed her sleeping areas, inside her cat flap and the door mats. I used an electric floor sweeper - the type with rotating brushes with a pan you can empty - every other day on the carpets - just main areas (not worrying about cracks and crevices) took about 5 mins. Then moved onto to weekly combs...And when I steam mopped the hard floors (once a week) ran it over her bed/ door mats etc too...At the start it was so bad that I could see flea larvae under her cushion etc ...recently I've been finding fewer and fewer fleas and dirt on her... Now I haven't found any fleas or dirt on her (or on her bed) for the last 6 weeks ...I really think I've finally won...I am going to carry on flea combing her and cleaning the areas she frequents (bed, cat flap, under window sills) once a week. And weekly hoovering.It isn't as hard as it seems - if you stroke your cat every day you can flea comb them...and if you don't worry too much about 'thorough' vacuuming it isn't hard...the way I look at it it you miss one flea one week you'll get it the next, you are cleaning up the flea eggs and larvae weekly and even if they mature you'll get them with vacuum (some research that you collect 90+% of mature fleas when you vacuum...)I will never go back to pesticides now ...it isn't as hard as I would have thought it would be - the flea comb method is free (once flea comb is bought!) and safe. And if you don't have a problem now - you can just do the weekly comb and vacuum and you won't get a problem - unlike relying on chemicals that stop working...I really recommend every one tries it and ignores the horror stories the pesticide manufacturers put around...