If the pipes are just sludgy but not fully blocked, skip the chemicals and use a natural reaction.
A double sink clog is a nuisance, but in 90% of cases, a dry plunge or a P-trap cleaning solves it in under 15 minutes. Good luck double sink clogged
Liquid fats and oils poured down the drain solidify as they cool, narrowing the pipe diameter over time. If the pipes are just sludgy but not