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Harris Eco-Friendly Enzyme Drain Cleaner and Clog Remover, 40 Treatments
More product info
From HARRIS
This report was last updated 1/11/2020.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Top products in Drain Openers with authentic reviews:
Report Card
Pass Overall Grade
FAIL 
Phrase Repetition
Phrase RepetitionWARN Suspicious Reviewers
Suspicious ReviewersWARN Reviewer Participation
Reviewer ParticipationPASS Rating Trend
Rating TrendPASS Unverified Purchases
Unverified PurchasesPASS Word Count Comparison
Word Count ComparisonPASS Overlapping Review History
Overlapping Review HistoryPASS Reviewer Ease
Reviewer EasePASS Brand Repeats
Brand RepeatsPASS Incentivized Reviews
Incentivized ReviewsPASS Deleted Reviews
Deleted Reviews
Most Trusted Reviews
I tried this in my upstairs sink. I made more ... [Go to full review]
Jan 7, 2019
100%
TRUST
TRUST
-
Verified Purchaser
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Take-Back Reviewer (10 deleted Reviews; avg. rating: 5.0) -
Overlapping Review History: reviewed 1 of 9 top products -
Easy Grader (avg. rating: 4.9)
Least Trusted Reviews
EDIT: 5/30/18 tried Draino and that made the drain worse. ... [Go to full review]
May 29, 2018
32%
TRUST
TRUST
-
Verified Purchaser
-
Contains repetitive phrases (
show)
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Take-Back Reviewer (1 deleted Review; avg. rating: 3.0)
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Overrepresented Participation (posted 13 Reviews) -
Critical Reviewer (avg. rating: 4.1)
Analysis Details
Fail Phrase Repetition
Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
20 of the 176 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 2.2 while reviews without substantial repetitive phrases rated this product an average of 3.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Warn Suspicious Reviewers
Suspicious Reviewers
Take-Back Reviewers
58 of the 176 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.
Warn Reviewer Participation
Reviewer Participation
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- 72%
- From reviewers with an overrepresented participation
We see the following 3 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 126 reviewers (or 72%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Rating Trend
Rating Trend
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- 0%
- Created on high-volume days
We counted 176 reviews for this product over the span of 904 days, an average of 0.2 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.
Read more about our Rating Trend test.
Pass Unverified Purchases
Unverified Purchases
1 of the 176 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
Pass Word Count Comparison
Word Count Comparison
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- 0%
- Have an overrepresented word count
We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.
Read more about our Word Count Comparison test.
Pass Overlapping Review History
Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
3% also reviewed:
Green Gobbler Drain Clog Dissolver, 31 oz by Green Gobbler
2% also reviewed:
SPOT Mini Skinneeez | Stuffless Dog Toy with... by SPOT Ethical Products
2% also reviewed:
Wellness Soft Puppy Bites Natural Grain Free... by Wellness Natural Pet Food
2% also reviewed:
Echo Dot (2nd Generation) - Smart speaker with... by Amazon
2% also reviewed:
Fire TV Stick bundle with Echo Dot (2nd Gen) -... by Amazon
2% also reviewed:
Amazon Store Card by Synchrony Bank
2% also reviewed:
Amazon Basics External Hard Drive Case by Amazon Basics
2% also reviewed:
Green Gobbler Drain Clog Remover | Toilet Clog... by Green Gobbler
2% also reviewed:
Amy Coulee Men's Casual Classic Short by Amy Coulee
22 of the 176 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Reviewer Ease
Reviewer Ease
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4, while the average ease score for reviewers in this category is 4.3.
4.0 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeats
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
Pass Incentivized Reviews
Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
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- 0%
- Admitted to receiving an incentive
We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Pass Deleted Reviews
Deleted Reviews
- 0
- Reviews have been deleted
We have not discovered any deleted reviews for this product.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.