I believe that some providers add water to their chemicals do you think so too?

That isn't just possible it is the very sad truth. Gas stations, over the counter medicines, some food stuffs, it all can be and is diluted to 'cut production costs' and 'keep the prices low'. Which is utter bullhocky! It is all about the profit of the company that is providing the good or service. I've seen it first hand with off brand 'nightquil' and it has about half of the amount of the active ingredients as the vicks brand. I ended up having to go back out with like the worst cold/flu ever to get the good stuff, because I was too sick to read the bottle in the store. And after two doses, and I felt no different I knew I had screwed up. I am glad you found a good one, good companies are really hard to find now days.

That will be part of their and any business. However satisfaction of the customers must be still considered. I think the first one really intended not to fully terminate the pests in your house so that you will call them again once you see pests. You are right, they will earn extra income. I think it has nothing to do with dilution of the chemicals used for pest, they might be using other brands that doesn't have the same effect used by your recent pest exterminator. Good day!

That is very much possible. Not only pest control company are doing these cheating methods-but also other cheap gasoline station. They add other substance to petrol to have a bigger profit. Bad people are doing their business for their own benefit - those are selfish business owners.

Checking the better bussiness burrow can help decide the best company. i am not sure they would dilute the chemicals, but it is certainly possible. I would ask questions and see what they say.