Dosing detergent without a dosing device often tends to lead to the overconsumption of detergent. When you dose detergent, it is advisable to follow the information on the pack and use the designated device.
Another reason may be excessively soft water. This is not a bad thing at all, since the action of detergent is stronger in soft water, and less detergent has to be dosed. A smaller quantity of detergent helps to save money and also solves the problem of frothiness.
In most areas in Estonia, water hardness is high; however, there are also some exceptions. Information about water hardness is available on the website of the company that supplies you with water. If you have your own borewell, this information is available in the technical documentation of your borewell.