@forgetfulannie, how is your husband doing on the higher dose of Temodar? Did you talk to your husband's team about your concern with sweating?

My brother-in-law has a battery operated OPTUNE device, wears it all night and takes it off 6 hours during the day. Has worn it for three months, with no skin sores. The dosage is transmitted thru his skull and no danger of being shocked since they are electrical pulses, , not electricity. Devices are changed every 3 day, no skin problems at all.
Please note I’m not a doctor or a nurse. Just relaying our experiences.

Best of luck. Please get with a support group, pastor or trusted friend or counselor for emotional/social and spiritual support. A registered dietitian will be of great help.