Answer by
Char0404lotte (5)
Step 1: Make sure you have new parts available.
Step 2: Pry off the handle insert, remove the handle screw (If the handle sticks, heat it with a hair dryer to free it. Be careful; if you pull too hard, it'll break); pop loose the handle & remove the stem.
Step 3: Replace stem.
Step 4: Use a seat wrench.