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58

spark plug cleaner

Worth a look

Shows a sweet-spot price point ($24.57 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 21Growth 40Conversion 60Competition 33Returns 89Price range 95Avg price 95Brand share 66Review moat 94Quality gap 83

Avg price

Incredible$24.57

avg listing price — sweet spot $15–$100

Price range

Incredible$14.95–$37.25

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Great111.29

avg incumbent reviews — the moat a new listing must climb

Returns

Great1.3%

return rate — above 6% kills the launch gate

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Brand share

Good65%

top-5 brand share — brands hold most of the demand

Conversion

Good5.2%

search→purchase rate — share of searches ending in a sale

Growth

Okay+12.4%

90-day search growth — must beat 0% to launch

Competition

Okay65%

top-5 click share — leaders hold, buyers still browse

Market size

Bad$84K

$84K/yr · 67K searches

Competition

The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.

Brands

17 falling

Sellers

22

Top-5 brand share

65%

Open market

27%

  • UNLRAE16%
  • CNRAQR15%
  • ABN15%
  • YGDMD11%
  • Purthog8%
  • Sunex Tools7%

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%5%$4K10%$8K15%$13K20%$17K1101001K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 17 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +12.4% search growth over the last 90 days.
2K1KSpike '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Reviews

What buyers praise and complain about, mined from review topics.

What buyers love

Value For Money20%

“worth the money”

Ease Of Cleaning15%

“Cleans the plugs well”

Quality-Overall10%

“The tool is very well-made”

Efficiency9%

“Works fantastic”

Advertised Vs Actual Product9%

“Works like it should”

Ease Of Use7%

“Easy to use”

Mounting5%

“mounts easily to the wall or bench”

Socket/Port/Plug4%

“More tool than you need for gapping plugs”

Product Condition3%

“the electrode looked pretty new”

Assembly/Installation3%

“requires minor assembly”

What buyers complain about

Quality-Overall21%

“Cheap”

Functionality-Overall21%

“doesn't work”

Instructions/User Manual/Troubleshooting8%

“Limited instructions”

Advertised Vs Actual Product6%

“not as advertised”

Value For Money6%

“Not worth even a dollar”

Ease Of Cleaning6%

“cleaned ok not great”

Defective Material/Parts6%

“Broken equipment”

Ease Of Use3%

“None of it was useable”

Socket/Port/Plug3%

“fine wire plugs which you probably shouldn't use in this product as it's a little aggressive”

Pressure1%

“DO NOT turn the psi up past 90/100 for I fear it may blow and cause personal injury”

Top return reasons

Functionality-Overall21%
Leak-Proof14%
Defective Material/Parts13%
Advertised Vs Actual Product9%
Material Quality5%
Compatibility-Overall5%
Value For Money5%
Ease Of Cleaning5%
Product Condition4%
Quality-Overall3%