Document both washing machines and the Marseille soap detergent

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

content/equipment/laundry/detergent.md

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+---
+title: Laundry Detergent (Marseille Soap)
+description: How to make and dose the home-made Marseille soap laundry liquid
+aliases:
+  - detergent
+  - laundry-detergent
+  - marseille-soap
+tags:
+  - equipment
+  - laundry
+  - household
+---
+
+# Laundry Detergent (Marseille Soap)
+
+We wash clothes with a home-made liquid made from **Marseille soap flakes and water**. Marseille soap works genuinely well here because our water is **soft** — in hard water it leaves limescale-soap residue, but that isn't our situation.
+
+## Recipe (2 litres)
+
+| Ingredient | Amount |
+|------------|--------|
+| Marseille soap flakes | 100–120 g |
+| Hot water | 2 litres |
+| Washing soda (*cristaux de soude*) — optional | 1 tablespoon |
+
+The washing soda is only worth adding for **greasy or heavily soiled loads**. Plain soap and water is fine for everyday washing.
+
+### Method
+
+1. **Dissolve** the flakes in the hot water, stirring until no flakes remain.
+2. **Let it rest 24 hours.** It thickens and may separate — that's normal.
+3. **Whisk before every use** so the gel is evenly mixed.
+
+## Dosing
+
+> [!tip] Start low — 50–60 ml per load
+> Soft water needs noticeably less of everything. Start at **50–60 ml per load**, not 100 ml.
+
+**Over-dosing is the main cause of residue on clothes and build-up in the machine**, and with soft water you hit that threshold sooner than the back of a commercial detergent box would suggest.
+
+If laundry comes out **stiff or smelling soapy, cut the dose further.**
+
+## Where it goes
+
+| Machine | Compartment |
+|---------|-------------|
+| Bosch Series 6 (first floor) | **Manual compartment on the left** |
+| Washroom off the kitchen | *TBD* |
+
+See [[laundry|Laundry]] for the machines themselves.