Diagnose from photos
The right part matters more than the right technique.
Tutorials are filmed on new fixtures in good light. Yours is fifteen years old and behind a cabinet.
Most DIY failures start with a misdiagnosis — replacing a whole faucet when a two-dollar cartridge was the problem, or patching a stain that's actually an active leak.
Photographs solve that. A wide shot and a close-up usually identify the fixture, the part and the fix, and then the job becomes a parts list and an order of steps.
The other half is judgment. Confidence without limits is how people end up with flooded kitchens, so we're deliberately firm about what belongs to a licensed trade.
The right part matters more than the right technique.
A modest kit covers the majority of household repairs.
Electrical, gas, structural and roofing go to licensed pros. Always.
Twenty minutes, free, on what it is and whether it's yours to fix.