if you own your own home, then you must learn what you need to know what the professional will be doing. that means, no wait times, no need to have strangers visit your home and no ugly cables running all over the house. so again, not having that locked down is a problem. boil the mixture stirring it frequently. the instruction you provided was logical and clearly spoken. i don't know what to think or do. i have to assume that the "law" where they live will be very interested in them upon their return. 