Look, cleaning a bong with isopropyl and salt works, and it's cheap, but it takes time and effort. Formula 420 is the lazy man's solution — and I mean that as a compliment. It's a pre-mixed liquid with abrasive crystals that dissolve resin on contact. Pour it in, shake for 30 seconds, rinse. That's it. Your glass comes out looking like you just bought it.
The Shake-and-Clean Is Real
You literally just pour it into your piece, cover the openings, and shake vigorously for 30–60 seconds. The crystals act like tiny scrubbers that reach inside percolator chambers and tight corners that cotton buds can't touch. Rinse with warm water and suddenly your glass is crystal clear. No soaking overnight, no scrubbing, no elbow grease. It's like magic in a bottle.
One Warning
This stuff is aggressive. Do NOT use it on acrylic or silicone — it will cloud the plastic and degrade silicone over time. Glass, metal, and ceramic only. For acrylic and silicone bits, get the dedicated Formula 420 plastic formula instead.