I've used my own variant of the heat method: http://www.newmalecontraception.org/heat-methods/ http://www.newmalecontraception.org/heat-methods/ I verified wi

I've used my own variant of the heat method: http://www.newmalecontraception.org/heat-methods/ http://www.newmalecontraception.org/heat-methods/ I verified with a microscope - the amscope 150 (iirc) was not quite $100 with some slides. I should have bought the microscope first.