How do I safely remove a wine ring in my Reidel glass without using soap? I only have ever used hot water.?

I never use soap on my good crystal as I know it is porous and will retain the soap. However, recently, the first time in 8 years or so, I left a little bit of wine over night in one of the glasses and it left a ring at the bottom of the glass. I have tried letting it soak in lemon juice and it was not effective. I will not use soap or bleach and was hoping someone can help me! Thanks!