I'm sure people on trt cant donate blood for various reasons so they withdraw blood at home. was curious anybody have any tips. Ive been using a 20 gauge, hose and pint bottle but seems like the needle gets clogged very quickly. when I go pour the bottle out, the blood is so thick I can barely get the blood out of the bottle. it was like a blood ball. coagulated blood? anyways was thinking of trying an 18 gauge next time and if that doesnt work maybe a 16. my hemoglobin is little over 17% and hematocrit at 51%.