While it’s possible to get rid of mice using products available to buy to consumers, they rarely seem to work to eradicate an entire population of mice infesting a home. If it was enough, there wouldn’t be such a need for us pest controllers! There are multiple reasons why it typically won’t work. For one thing, the products available to the public tend to be of low quality, and typically sold in small pack sizes. We also often we find that the wrong product is used for the wrong type of pest. That’s because poison is marketed to be good against both mice and rats, yet it takes experience to know that mice and rats are very different regarding what they like to eat.
Another problem is that traps tend to not work well in London, whereas they seem to work better in the countryside. It’s like the mice in London are more experienced, and that they teach each other to avoid traps! You might catch a few mice in the beginning on a trap, but very soon they learn to avoid the traps completely. Besides all of that, mice multiply at a fast rate, with around 5-15 new mice per litter. And they can have a new litter 5-6 times per year. So even if you catch a few on some traps, you’re chances of wiping out the entire population are slim.
These are some of the main reasons why people tend to need professional help to get rid of mice in London.