Is the tumor cancerous?
Has there been a change in the tumor in the three weeks you have been applying MMS1? Are you documenting with photos? How are you applying MMS1 / DMSO?
Are you mixing DMSO with MMS1 or applying DMSO separately, after applying MMS1? One teaspoon of DMSO seems too much. After applying MMS1 for 3 weeks, there shouldn't be an infection. If you mix DMSO with MMS1, CLO2 will eventually be neutralized by DMSO. If you add DMSO to MMS1, only do so just before application.
I would suggest to follow the HRP in Jim's latest book. Take MMS1 internally beginning with the Starting Procedure and continue with external application of CLO2 / DMSO.
Externally, I personally would use undiluted, strong CDS followed by DMSO on top of CDS. CDS has much more CLO2 externally than MMS1.