Hey, Mike! Greetings from Houston to Poland. I am so glad it helped you. As our vehicles age, I’m sure new types of EVAP leaks will start showing up but the purge solenoid is so notorious, inexpensive and easy to replace that many DIYers may want to replace it as a first step before paying $$$ for a professional to hook up a smoke machine.@BrettP thank you very much for your tips and "manual". Replacing the EVAP purge valve did help in my case. Since I made the replacement I'm driving now about 2 months without the MIL. It came out almost every week so in my case this simple fix resolved the problem.
Kindest regards from Poland