Clearly they do work as some on here have built successful business's using them, albeit as part of the mix
It seems a no brainer to me that you would use spotters as part of the touchy feely part of your business along with Calenders (very important this time of year) and good quality calenders at that.
What better right now to give your customers a decent spotter plus an excellent calender with your business name and number on every page of the month that remains right in front of your customer for a full 12 months,
If its a crap calender it will be binned,ignored or put in a draw, make it a full size bright coloured with good content that people want to look at every day and mark with important dates, including their next clean.Any time any acquaintance,member of the family ,business contact anyone, mentions carpet cleaning they will have the opportunity to refer you to them as your name has been drilled into them month after month.....
Oh but the cost !!!!!!!