Sounds like this would have an obvious answer. Like when they are dirty, right. But not so fast, I have seen many carpets that looked clean but upon cleaning them all sorts of dirt was extracted.
So how can you tell when they are dirty. Sure sometimes there are dirt spots or stains and that’s when it’s obvious. But carpets also need to be cleaned even if they don’t show spots or stains.
When it comes to carpet cleaning, vacuuming is the best thing that a home owner can do for them, however that alone is not enough. Sand and dirt will settle deep into the carpets and vacuuming alone will not be enough to remove it.
After a while carpets will start to show wear patterns and abrasion from the sand and debris as well as from the foot traffic.
Sure dirt spots, and stains often indicate when you should have them cleaned. But you can also use a calendar to determine the time. Professionals say every 12 to 18 months is the right time to have it done. There is also the fact that you might be able to have them cleaned at a lower price during the winter months. The reason for this is that carpet cleaners are a bit hungrier over the winter months because they want to be busier. The drop in appointments can certainly provide the consumer an opportunity to save some money.
Carpet manufacturers state in their warranty booklets that if carpets are not cleaned every 12 to 18 months the warranties will be voided. Should you have to call them about a warranty issue they will often request carpet cleaning receipts. Be sure you keep them handy.