It is recommended to either post or make people aware, when having a foam party, that if anyone is allergic to soap products they should not get in the foam or they enter at their own risk. It is always possible for someone to get or have irritation. It is possible for some eye irritation. It is recommended to have a wash station or water source for people to rinse if needed. Although we have not had any problems it is for safety reasons we recommend these things for everyones safety. If for any reason the foam does not seem to be foaming well we have found here and there to be a hard water problem. Water is different in every area of the world. The softer the water source the better the foam will be. There are products on the market to help make your water softer.