diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e827359
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+test.yaml
diff --git a/internal/db/queries.go b/internal/db/queries.go
index db46145..7a32cf5 100644
--- a/internal/db/queries.go
+++ b/internal/db/queries.go
@@ -4,8 +4,6 @@ import (
 	"context"
 	"encoding/json"
 	"time"
-
-	"github.com/jackc/pgx/v5/pgtype"
 )
 
 type InsertWS90Params struct {
@@ -38,8 +36,7 @@ type InsertWS90Params struct {
 func (d *DB) InsertWS90(ctx context.Context, p InsertWS90Params) error {
 	b, _ := json.Marshal(p.Payload)
 
-	var payloadJSON pgtype.JSONB
-	_ = payloadJSON.Set(b)
+	payloadJSON := json.RawMessage(b)
 
 	_, err := d.Pool.Exec(ctx, `
 		INSERT INTO observations_ws90 (
@@ -90,8 +87,7 @@ type InsertOpenMeteoHourlyParams struct {
 func (d *DB) UpsertOpenMeteoHourly(ctx context.Context, p InsertOpenMeteoHourlyParams) error {
 	b, _ := json.Marshal(p.SourcePayload)
 
-	var sourceJSON pgtype.JSONB
-	_ = sourceJSON.Set(b)
+	sourceJSON := json.RawMessage(b)
 
 	_, err := d.Pool.Exec(ctx, `
 		INSERT INTO forecast_openmeteo_hourly (
diff --git a/internal/mqttingest/latest.go b/internal/mqttingest/latest.go
index 9403e8a..9b0922c 100644
--- a/internal/mqttingest/latest.go
+++ b/internal/mqttingest/latest.go
@@ -40,7 +40,7 @@ func (l *Latest) Update(ts time.Time, p *WS90Payload) {
 	l.lastTS = ts
 	l.last = p
 
-	inc := l.computeRainIncrement(ts, p.RainMM)
+	inc := l.computeRainIncrement(p.RainMM)
 
 	// Track last hour increments
 	l.rainIncs = append(l.rainIncs, rainIncPoint{ts: ts, mm: inc})
@@ -75,7 +75,7 @@ func localMidnight(t time.Time) time.Time {
 
 // computeRainIncrement returns the “incremental rain” in mm for this sample,
 // regardless of whether the incoming rain_mm is cumulative or incremental.
-func (l *Latest) computeRainIncrement(ts time.Time, rainMM float64) float64 {
+func (l *Latest) computeRainIncrement(rainMM float64) float64 {
 	// First sample: we can’t infer anything yet
 	if l.lastRainMM == nil {
 		l.lastRainMM = &rainMM