Photograph: Bedroom

Why Green Shield Pest Control is better...

Green Shield is another weapon in the arsenal of the battle against rodents. As with any pest management regime, no one method is completely effective, but combined with good hygiene and proofing, it is most likely to deliver the required result.

Compared to poison

Poison can work well but it does have one drawback: it kills the animal that eats it. Your problems start afterwards. Rats and mice live or travel through the wall and roof spaces, and under the floors of our homes and offices. They're small and very nimble - they can climb into the tiniest hole to make a nest. This is quite likely to be the place where a poisoned animal will die, and where the corpse will decompose.

And the bad smell of decomposing vermin is awful, and there's very little you can do about it. Even if you have a rough idea of where the nest is, you'd have to pull up floorboards or open holes in walls to make a hole large enough for you to gain access to deal with it; and what you'd find would be extremely unpleasant.

The only thing you can do is hope for good weather, because then you can at least open all the windows wide and hope the wind blows the smell away.

Compared to traps

Rat and mouse traps come in all sorts of shapes and sizes, some more reliable than others. Entice the vermin with some suitable bait (almost anything will do, but chocolate or peanut butter are a good choice) and sooner or later you might end up with a catch. (Watch out, though - some vermin are smart enough to get the bait without being caught!)

The problem with traps is that you still have a rat or a mouse to dispose of; and with glue boards, this will be a live rodent. Standard traps leave you with a corpse, which you shouldn't touch because of the possibility of disease.

What's more, used on their own, traps are a burden on your time. They need to be constantly checked, re-baited, and checked again. If you've placed them in loft spaces or dark corners, this soon becomes irritating.

Compared to ultrasonic pest control

Most people have heard of ultrasonic pest control devices. Unfortunately, not many people know that they are just not effective.

Pest control experts were discussing this as long ago as the early 1980s. Studies performed then showed that while ultrasound might trouble vermin for a few minutes, perhaps even a day or so, to begin with, it was not a long-term solution.

The pests can get used to the new sound environment and carry on as before. They're not deterred and they're not dealt with.