Interview advice

[sheila s]

I was wondering if anyone has any interview advice that can encourage potential parents to take a spot.
I have been in this business for 19years & families stay with me for at least 6 years.Recently I had 3 children leave (siblings) & have managed to fill one of the spots with a part timer.The trouble is I have been doing interviews( 4 in total) & nobody seems to want a place.
I am beginning to take it personally ,as in the past, I have always filled spots by referral only.I am not sure what I am doing wrong.My home is clean & safe,with a structured learning program,meal plan,tax receipts,contracts,e tc, etc.I am fully qualified & have lots of experience.I have put ads on web sites & flyers on mail boxes but can't seem to get anyone.Obviously something is going wrong at the interview process but I can't seem to pin point what.
A couple of times I have emailed parents back( to try & get feedback) but get ignored.I am not sure if it is because I have pets? (but I do tell people before they even come to my home), is my house is too clean?, am I too expensive ? is it,that I use my basement as the learning/play centre.?
PLEASE, somebody tell me where I am going wrong?It is driving me mad & have to admit causing me a lot of stress