How to check the soap solution before buying it?

How to check the soap solution before buying it. First you need to understand the requirements for the detergent and the seller.

If you still have doubts, you should:

Firstly, call the seller so as not to send money to nowhere;
Secondly, invite him/her to show you the properties of the solution for a bubble show online, via Skype or another video calling app;
Thirdly, if there is no possibility to demonstrate online, ask for live video. Now every mobile phone is equipped with a camera;
Fourthly, offer him/her to send you a sample of the detergent. If a person is confident in his/her product, he/she will certainly agree.

Be sure to ask if they can help you in finding the ingredients, if the tips for the bubble show detergent (Detergent recipe) are included in the price.