How to self-catherize if you are a male

Void into the hat. Measure the amount of urine and record it in the voided volume column on your record sheet.
Carefully, wash and dry your hands.
The male can sit on the toilet or lie on a bed with back and head propped up.
Lubricate the catheter for a distance of 6 to 8 inches.
If necessary, retract the foreskin. Clean the head of the penis with a soapy washcloth or an antibacterial wipe.
Hold the penis upright, and insert the lubricated catheter into the urethral opening of the penis.
Thread it in slowly until urine flows, usually a distance of 6 to 8 inches. When urine flows, allow all the urine to drain into the hat.
Slowly, pull the catheter out.
Wash the catheter with soap and water, dry it with a clean towel and store it in a resealable plastic bag. The catheter may be re-used for 1-2 months.
Measure the amount of urine in the hat and note the volume in the post void residual column of your record. Discard the urine into the toilet and wash out the hat.